Database Info

Kenwood BT-200 Handsfree Kit

I've got a Kenwood BT-200 bluetooth handsfree car kit and have found the following issues with it;
1. Everytime a call is completed, the phone book downloads all over again and takes over 10 minutes, preventing making follow on calls till complete.
2. The received and dialed calls list doesn't work
3. Cannot initiate a call from the head unit unless the phone screen is on (was working perfectly on previous HTC Touch Cruise).
4. Unable to initiate voice dialing on Phone using Microsoft Voice Command whereas with previous HF kits it was as simple as pressing and holding the call button.
Anyone else use the same Touch Pro - BT200 combination? Or experience similar problems with other HF kits?

I have Pioneer BT unit. I can not connect, but I installed Hands-Free Config from JETware Mobile Software and it solved all my problems. There are many setting options which should help you...

Hi Pritman,
I just went through the same thing after upgrading to the Touch Pro from the Dopod 838Pro (Hermes).
There's a firmware update available for the KCA-BT200 which may well fix your issues (certainly did mine).
I created a post about this earlier today (didn't see your post here).
http://forum.xda-developers.com/showthread.php?t=440494
The firmware flash is very easy to do. You will just need a laptop with a bluetooth adaptor.
Codenix.

Kenwood have released another update.
See my other post at http://forum.xda-developers.com/showthread.php?t=440494 for details.
Codenix.

Wow, never thought I would fine anyone else with the combination of Kenwood DNX-7100, KCA-BT200 AND the touch pro. I am having similar issues.
DNX-7100 with BT100 worked fine with touch pro.
"upgraded" to BT200, and I have nothing but headaches.
I have tried two different BT200, and both have been flaky.
I have tried BT200 firmware 1.60 and 1.70, and both have been flaky.
My problem is similar to the ones you folks have been experiencing, mainly it is constantly downloading, and the interface is super sluggish when downloading. I can retrieve a name and phone number from the BT200's memory, but when I call out it will say downloading and do nothing. Sometimes it won't "pair" with the phone automatically unless I manually select my phone from the DNX-7100, and sometimes it will just drop the connection. I used the BT100 for about a year, and it was solid 95% of the time. I am running stock Telus rom, btw. I have also played around with the dip switch on the BT-200. From the shipped manual, DNX-7100 belongs in group F, which is off, off, on for dip switch 1, 2, 3. But when I searched online, some of Kenwood's info listed the DNX-7100 under group G, which has dip switch off, on, off, just to add to the confusion. I have also tried removing the "wireless stereo" profile as well as the "serial port" profile, but that fixed nothing. Lastly, just to kick me when I'm down, when it list the numbers, sometimes it list them as first name, then last name, but sometimes it list it as last name then first. This is super irritating as you can't be sure where anyone is listed ..... so far my experience with the BT200 has been nothing but horrible. I am on the verge of flashing my touch pro to a cooked ROM just to see if it is due to the stock Telus rom's bluetooth (I went back to stock as the juggalo rom I used became corrupt after a few weeks).
So, did you guys finally find a solution that worked 100% of the time?

Idea
Hi Guys, I'm glad there are more people out there with my combination.
Upgrading the BT 200 to 1.70 has improved things significantly but not as good as it would be with another handset like a Nokia N95. The download delay and sluggishness still exist.
I recall when I paired the TP, a notice came up on the TP that the BT 200 is requesting access to the phonebook or contacts and prompted me to allow or deny. I'm wondering what would happen if I deny? I do know that when I first paired the N95 with the older firmware, it wouldn't syncronise the contacts and I had to manually send the contacts to the BT 200. If this can be done with the TP, it may eliminate the constant downloading, perhaps.
Anyone else willing to try this. I may not be able to do this till later this weekend so if any of you do manage to test this before me, please post the results.
Good luck!

If you don't give it access to the phonebook, I suspect it can't download your phonebook automatically, and you would have to manually push the phonebook over, which defeats the purpose of the BT-200, effectively making it a BT-100. After trying a 2nd BT-200 for 3 days, I have given up and chalked up the BT-200 as extremely flaky, and is easily the worst purchase I have ever made as:
1) Half the time it won't pair with the phone automatically
2) The other half when it does pair, you can't dial out as half time time again when you want to make it call, it decides to do a download from your phone instead (never mind that it already "downloaded" when it paired already. Half x half = quarter.
3) Half the time when it does manage to make it call, it magically drops the bluetooth pairing and drops the call.
If you're keeping track, we are at half x half x half, which is 0.125, or this damn thing only works 12.5% of the time. This is not a time saver, nor a gadget of convenience/safety. It is the ultimate source of anxiety, danger (as you're trying to get the damn thing to work), and a big disappointment. Kenwood, shame on you for putting out such flaky products, and especially for not fixing it (look at the first post, it is from Oct 08).
I am going to return both of my BT-200 to Clutchfield, and am going back to my 99% stable BT-100. BT-100 actually is not as horrible with the TP as TP runs WinMo 6.1, which lets you push multiple phone book contacts at once (not like the older WinMo where you had to push contacts ONE BY ONE!!!). The only caveat with the BT-100 is if you need to delete or modify any contacts, you can't, and you have to delete all the entries for a particular phone and repair and push all contacts again, which takes 1 minute now as oppose to half an hour with pre-WinMo 6.1. When I buy a HU next time, I don't think I will consider Kenwood again due to:
1) Flaky software/interface.
2) Poor documentation.
3) Poor service support. Kenwood Canada actually NEVER REPLIED. I only received the auto-gen email notification indicating they received my email. Clutchfield Canada has been very supportive, and I will pay more to buy from them in the future solely due to their strong customer support.

Hi Johnnysks,
As far as the Touch Pro is concerned, I understand your frustration and totally support your argument.
On the other hand, I have tested the BT-200 with a Nokia 96 & my previous Touch Cruise, works like a dream! I've had good responses from Kenwood UK but whenever I contact HTC, I alway get vague responses, which to me suggests that Kenwood must have been making the effort but keep getting let down by HTC. Ultimately the BT-200 works with majority of the handsets out there.
I will still keep trying for a solution though as I really do like the TP and the BT-200!

I have no doubts the BT-200 works with other phones, and I know my TP works with my BT-100 flawlessly. I also know from prior personal dealings with Kenwood Canada's technical support that:
1) They're rude, have a bad attitude, and unprofessional (as my first inquiry for a different product from a year ago was met with a reply that was condescending, unhelpful, and was not even in proper English). I'll be more than happy to dig up my old email for you if you have any doubts.
2) They're not responsive. It's been over a week, and they never replied to my current inquiry regarding the BT-200 (funny. They used to be rude and unprofessional. Now they're missing in action)
Perhaps Kenwood USA, Kenwood UK, or Kenwood Japan are doing an awesome job. However, I can only go with what I have personally experienced.

Anyone find a fix for this? I have the same problems with my DNX8120. Tried Jetware, no luck, I would try BTRestore, but it won't work with .net 3. My biggest complaint is that even if it is connected via bluetooth, it won't start a call from th eheadset unless the phone is not in standby. Next biggest issue is that it drops the connection after hanging up from a call.
Very f*&%*g annoying!
FYI, worked with 2 different ETEN's

NEC Terrain Rooting and Flashing Guide

I am starting this thread to be a place for Terrain owners to come for the latest info on how to root and flash their phones. The Terrain is one of the best "rugged" phones on the market, but it has been abandoned by it's manufacturer, leaving owners to find their own solutions to problems and upgrades. This is actually a good thing price wise as you can now buy a brand new Terrain for less then $85. The Terrain has about as of hardware specs as any other ruggedized smartphone on the market currently, but at one third or a 1/4 of the cost. This makes this phone a huge attraction to anyone who is looking for a rugged waterproof phone on a budget and is why this guide is essential for users.
The NEC Terrain still has plenty of life left and this is why we need to come together and find solutions for it. Please feel free to post you success stories in rooting and flashing your terrain to this thread for the benefit of all. Hopefully, will be able to form a complete guide from all the information that get's posted here.
Thanks.

Hi!
I myself just today recieved this phone, and it would be great at least to debloat it.
Previous threads on XDA, just for reference:
NEC Terrain: ADB/CDC Serial Driver, 3e Recovery Password, and Root
[Q] Rooting NEC Terrain
[Q] Unlocking of NEC Terrain SIM/Root

gamerka said:
Hi!
I myself just today recieved this phone, and it would be great at least to debloat it.
Previous threads on XDA, just for reference:
NEC Terrain: ADB/CDC Serial Driver, 3e Recovery Password, and Root
[Q] Rooting NEC Terrain
[Q] Unlocking of NEC Terrain SIM/Root
Click to expand...
Click to collapse
Thanks for the post and the links. It appreas that much of the information on these links are still a work in progress. Hopefully this work will continue and we can create a How To guide from this.
For those that may be interested. You can buy the NEC Terrain Unlock on Amazon for $79.99. Here is the link.
http://www.amazon.com/NEC-Terrain-UNLOCKED-WaterProof-DustProof/dp/B00KZPI04S/ref=sr_1_1?s=wireless&ie=UTF8&qid=1405614968&sr=1-1&keywords=nec+terrain
For full specs on this great phone you can go here.
http://www.gsmarena.com/nec_terrain-5553.php

Well, I almost bricked it few days ago. :good:
I read a thread about a patch to unlock GSM in CDMA phones and saw there a code to enter some hidden menu. I entered that menu and messed a little with band settings (wanted to get LTE to work with my operator). Next thing I know Terrain stopped receiving any GSM signal and for next hour I tried to fix it. Factory reset got me 2G signal and that's all.
It turned out that the only way to fully fix it is to re-flash firmware or radio module and as we know that can't be done.

Well, this is not about unlocking or flashing, but it is a solution to another problem I and many other have been having with the predictive text bar blocking critical function keys from being accessed. The predictive txt bar is a function of the Adaptxt keyboard app and disabling it does remove that bar, but the keyboard also loses all special character function, upper case letters and numbers. After trying more then a dozen keyboard apps to replace adaptxt, I found one that works and brings back all keyboard functions without the stupid predictive text bar. It is called TouchPal.
https://play.google.com/store/apps/details?id=com.cootek.smartinputv5&hl=en

Forgive me for this slight OT-posting, but it's not that easy to find people with this device - let alone an unlocked one. I'm located in Germany and the device runs just fine - except for the fact that Tethering does not work - neither USB nor WIFI. The PC can connect to the phone, however the connection in Windows 7 always is shown as being limited (no internet access), while internet on the phone works fine.
GMail - as well as some other functions of google also rarely sync and basically just do so on request, while they sync just fine when being connected to Wifi. And no, background data are not restricted in the settings.
Has anyone experienced something similar?

laserdrome said:
device runs just fine - except for the fact that Tethering does not work - neither USB nor WIFI.
Click to expand...
Click to collapse
I have the same problem! After few minutes of "thinking" phone reports "There is a temporary nework problem... bla, bla, bla"
Is there any suggestions how to fix it?

iDomino said:
I have the same problem! After few minutes of "thinking" phone reports "There is a temporary nework problem... bla, bla, bla"
Is there any suggestions how to fix it?
Click to expand...
Click to collapse
Well actually I know that message as well. For me changing the APN helped. You could also try to restart the phone. I just remember I also had this problem sometimes. But like I said - even without that particular message I would not get tethering to work.
iDomino: Do you also experience the problem with syncing that I had?

That's funny, actually I haven't noticed syncing problems untill I read your posts. I myself have all the same problems that you mention.
Even more of that, Terrain has some silly feature that TURNS OFF WI-FI if it thinks that that hotspot has no internet connection. It is massively annoying and can drain all your data traffic. The only solution that I found is to install the app "Smart Wi-Fi Toggler", it constantly turns wi-fi on if terrain turns it off, but only in places where I turned wi-fi on myself (like home and work).

It's a pity the phone has so many flaws and due to its tight security and the locked down NEC mobile devision no one can do anything about it. I wonder if this just affects the users who use an unlocked phone outside the US or if people in the US have similar problems. I have tried contacting NEC about this - actually about providing us with some kind of unlock mechanism - but all I got was this:
"Dear Sir,
Thank you for inquiry.
We, however, regret to inform you that our phone is not available about your request.
If you have any issue, would you try to contact the company or shop where you have purchased this model, who might be of help to you.
Thanks and Best Regards,
Fujii /NEC"
By the way, I discovered a new bug: When Roaming the actually used Network-Provider is not shown and I also didn't find a way to choose one...

Do you also experience the problem with syncing that I had?
Click to expand...
Click to collapse
I had some sync problems and I don't know working methods to fix it.
First time I solved it this way:
turning off apps sync -> open Gmail app -> it will show notification offering to enable synchronization -> use it -> sync works.
But this solution worked just once. (
Other time sync turns on by itself after one day disabled.
P.S. My Nec reboots while connecting via USB to ubuntu laptop.

Battery life
Can someone tell me how your Terrains battery hold up charge? Because mine discharges completely in about 10 hours (without using phone at all). I think it's wakelock problem.
iDomino said:
P.S. My Nec reboots while connecting via USB to ubuntu laptop.
Click to expand...
Click to collapse
Does it crashes once or infinite loop begins? I had infinite loop problem while connecting NEC Terrain to Ubuntu, Linux Mint, Debian or CentOS. Removing "ModemManager" package solved it.

FFDA said:
Can someone tell me how your Terrains battery hold up charge? Because mine discharges completely in about 10 hours (without using phone at all). I think it's wakelock problem.
Does it crashes once or infinite loop begins? I had infinite loop problem while connecting NEC Terrain to Ubuntu, Linux Mint, Debian or CentOS. Removing "ModemManager" package solved it.
Click to expand...
Click to collapse
My phone works about 25-30 hours (30 min. calls, 5-10 sms, 30 min. messaging, 2 hours e-mail, internet & other applications. No video/gaming/music at all).
Infinite loop. Removing "modemmanager" helps! Thank you! :laugh:
Also got spontaneous rebooting after installing FTP Client made by Zifero. :silly: Removing app solved the problem.
Dreaming about root and working wi-fi tethering.

Who have usb driver of nec terrain? I need it, thanks

zolahn said:
Who have usb driver of nec terrain? I need it, thanks
Click to expand...
Click to collapse
Maybe this topic will help.
Cpu-z shows only 665MB RAM on device... Where are another 335MB???

Lets continue discussion in one thread!
http://forum.xda-developers.com/showthread.php?p=59514154#post59514154
I created a GitHub repo to collect information, also on how to disable apps (since thats as good as it gets for now).

Another Terrain user here!
Hi guys!
i am Kharl
i am another Nec Terrain user here!
due my lifestyle, i needed a phone which could gives me reliability and power under ANY circunstance, that could be done by any rugged phone, BUT i needed querty keyboard, fm radio, gps, gyroscope, accelerometer, loud speakers, that could work worldwide and touchscreen... the only one with those features was the Terrain... and with the extra, that it is amazingly cool, i dont know opther but i find this phone really cute, very sober and elegant design.
well, i live outside USA so, for me, to work it couldnt be locked to ATT, so i was able to get one unlocked.
my phone has almost all the problems you mentioned, althught i am still happy with it and i am not going to change it because its problems does nto interfere a lot with me, BUT of course id like to get those problems sovled.
trying to solve the problem i bough three of thes phones and all the three had the same problems
the first one was by mistake, locked to att, but it had the same problems, random restart and locked hotspot, i sold it, i got a second one, works with any sim, everything fines, but with the same problem, random restart and no hotspot, i bought a third one to see if the problem was with my particular phone... and n luck the same problems.
it has some other minors problems, like no stereo audio recording despite it has two mics and IT STATES IT CAN record in stereo, but thats not a problem, i can deal with that, and sometimes the people at the other side (while in a call) says my voice sounds like from within a box (lack of trebble or too much bass) and when i press the check too much to the phone boddy there is also clarity sound problem.... but thats ok....
regarding the two main problems
random reboot and hotspot
many of us suspect what the cause is
for the random reboot many could think it is a installe app which is causing it... NO, because it does it at factory state, to solve that i dotn think root is needed, there is a certain factory process that is causin to reboot, the reboot is VERY random, could doit threee times in a day or could happen only three times in a week, what i have notice is that it happe lessoften in cold weather.
the hotspot problem IT IS cause because att locked that function, even when the phone is ulocked, that part remain locked because ATT.
what about you guys?

u can try hard reset for begging

Unbelievable. Oneplus claims that a bug is now a feature.

Here, check this out.
Me:
When two BT devices capable of telephony functions are connected, the second one connects as "Connected (no phone)", and its telephony function cannot be used.
Example (picture attached). If Huawei Watch is already connected, when Jabra Talk attempts to connect, it will connect as described above, and one cannot make or receive phone calls on Jabra Talk (but still can on the watch.)
Oneplus support:
Thank you for taking the time to send us this email as well as the screenshot that you provided. I understand that you want to use both of the Bluetooth devices for easy access and getting in touch with loved ones for helping us keep on track with our daily activities.
I would like to inform you that the OnePlus 6 can actually connect to two Bluetooth devices. However, by default, you can only choose one for making and receiving calls. Just choose which you preferred to use by toggling the "Phone calls" under each setting of the Bluetooth devices.
This bug was not present in 5.1.5. They introduced it in 5.1.6/7.
This bug is present in all Pixel phones because it's a buggy Google code that Google simply does not care to fix.
Samsung fixed this in their phones.
So, I am guessing OP had this fixed in 5.1.5, but then they just lazily copied and pasted that Google garbage code.
And they don't know how to fix it now. So now it's a freaking feature.
UNBELIEVABLE!

I have the same problem with my Huawei Watch and my cars hands free system
I tried to disconnect the watch with Tasker as soon as my hands free system connects, but it never worked reliable (because the watch connects again immediately and takes over the call functionality)
I guess we need to wait until we get Android Pie because as far as I know this problem is solved with Android Pie

MJFox78 said:
I have the same problem with my Huawei Watch and my cars hands free system
I tried to disconnect the watch with Tasker as soon as my hands free system connects, but it never worked reliable (because the watch connects again immediately and takes over the call functionality)
I guess we need to wait until we get Android Pie because as far as I know this problem is solved with Android Pie
Click to expand...
Click to collapse
I hope so. But I'm not that hopeful - I think it's a Google bug, and they simply don't care to fix it.
Meanwhile, I have to disable the phone functionality on the Watch so I can use my hands free car kit.
It's so disappointing, especially since this stuff always worked with Samsung phones, OOS 5.1.5 (the bug was introduced in 5.1.6/7) and even the early Pixel, pre Android 7.0.2.

nabbed said:
Here, check this out.
Me:
When two BT devices capable of telephony functions are connected, the second one connects as "Connected (no phone)", and its telephony function cannot be used.
Example (picture attached). If Huawei Watch is already connected, when Jabra Talk attempts to connect, it will connect as described above, and one cannot make or receive phone calls on Jabra Talk (but still can on the watch.)
Oneplus support:
Thank you for taking the time to send us this email as well as the screenshot that you provided. I understand that you want to use both of the Bluetooth devices for easy access and getting in touch with loved ones for helping us keep on track with our daily activities.
I would like to inform you that the OnePlus 6 can actually connect to two Bluetooth devices. However, by default, you can only choose one for making and receiving calls. Just choose which you preferred to use by toggling the "Phone calls" under each setting of the Bluetooth devices.
This bug was not present in 5.1.5. They introduced it in 5.1.6/7.
This bug is present in all Pixel phones because it's a buggy Google code that Google simply does not care to fix.
Samsung fixed this in their phones.
So, I am guessing OP had this fixed in 5.1.5, but then they just lazily copied and pasted that Google garbage code.
And they don't know how to fix it now. So now it's a freaking feature.
UNBELIEVABLE!
Click to expand...
Click to collapse
if Google's code is garbage, I suggest you stop using android and start making your own good code!

nabbed said:
I hope so. But I'm not that hopeful - I think it's a Google bug, and they simply don't care to fix it.
Meanwhile, I have to disable the phone functionality on the Watch so I can use my hands free car kit.
It's so disappointing, especially since this stuff always worked with Samsung phones, OOS 5.1.5 (the bug was introduced in 5.1.6/7) and even the early Pixel, pre Android 7.0.2.
Click to expand...
Click to collapse
I disabled the phone functionality too
I had a Samsung phone before as well (Note 8) and with that I had no problems with my hands free kit but instead the smartwatch lost the phone functionality after a few hours so I always had to reconnect it (basically the same problem but the other way round)... it's very frustrating that such a pretty basic thing doesn't work properly
I also tried this app: https://play.google.com/store/apps/details?id=org.myklos.btautoconnect
but it didn't seem to make any difference, it didn't seem to make anything at all
I read that Android Pie is able to connect to more than one Bluetooth headset at a time so this should fix the issue after all

kewlest22 said:
if Google's code is garbage, I suggest you stop using android and start making your own good code!
Click to expand...
Click to collapse
I had a Pixel XL for over a year. Only kept it for Project FI. Bug ridden POS.
Sold it for half going price just so I could feel clean again.
Even if Samsung *used* to have sluggish Touchwiz in the past, at least it didn't have deal breaking bugs.
Don't even have to make my own code - some XDA roms had fixed this bug, as opposed to Google.
MJFox78 said:
I disabled the phone functionality too
I had a Samsung phone before as well (Note 8) and with that I had no problems with my hands free kit but instead the smartwatch lost the phone functionality after a few hours so I always had to reconnect it (basically the same problem but the other way round)... it's very frustrating that such a pretty basic thing doesn't work properly
I also tried this app: https://play.google.com/store/apps/details?id=org.myklos.btautoconnect
but it didn't seem to make any difference, it didn't seem to make anything at all
I read that Android Pie is able to connect to more than one Bluetooth headset at a time so this should fix the issue after all
Click to expand...
Click to collapse
I am almost positive that if you had a somewhat similar problem on a Note 8, it's probably Google's fault.
I don't really use the 2 BT phone functionality for more than 30 min on average, but I've never had any problems on Note 7, GS6 or GS9, or even on a Pixel pre 7.0.2 android, when this bug was first introduced.
After 7.0.2, bluetooth stuff just broke everywhere. This bug, constant disconnects and reconnects, for some people music skips, for some doesn't even work, BT UI in Settings just crashing etc.
It's like Google replaced their BT programmer with a monkey at that point, or even a monkey's nephew.

So just because you cannot use 2 Bluetooth devices simultaneously to make phone calls, it's a deal breaker??? Lmao please please please go back to Samsung so we don't have to hear the whining anymore. Good luck with those bootloaders

Android 11 Bluetooth connection Problems - Any permanent fix yet ?

Phone Motorola One Vision (unlocked but NOT rooted)
Recently got updated (in UK) to Android 11 ~ 24th August 2021
Received a Security Update (dated 1 August) on 1st September 2021
Problem: Bluetooth will not stay connected - phone 'sees' whatever I try to connect to, it might 'connect' but then disconnects - depending on device it may take a few attempts before giving up
Firstly before anyone says 'search for it' - I have.
I've seen many posts about Android 11 & it's 'broken' bluetooth & the many so-called temporary fixes - but nothing works for me
(Clear Cache/Data, Reset Networks, Delete/Upair & reconnect etc) - Only thing I've not done is a full Phone factory reset
When the phone got updated to Android 11 everything went smoothly, except I had to go through all my Apps & (re)give the necessary permission to SD card etc. This also meant my Car Infosystem (SYNC 3 on a 2018 Ford C-max) didn't recognise my phone - so I deleted it & reconnected it & afaik for the week I was on Android 11 the phone stayed connected without any problems.
My Bluetooth Earbuds (cheap pair off of Amazon) still worked without any sound drop-off & My Amazefit Bip watch also stayed connected (apart from the occasional 'hiccup' when the App I use gets an update)
I then received a 'Security Update' a week later & now I've noticed Bluetooth is NFG (No F-ing Good).
When I try to pair up, the device(s) are seen (whether the car, earbuds or another phone) - I get the usual 'Check Pin matches the same as...' messages & I confirm.... then the phone disconnects/reconnects/disconnects until it finally gives up
In the case of the Car connection I get additional messages such as 'Allow Access to messages - An Untrusted Bluetooth device Ford C-Max, wants to access your messages' & I also get 'Bluetooth has stopped' pop-ups
In the case of Pairing up Phones - it just connects & disconnects, sometime when trying to reconnect - it doesn't even try to connect
The ONLY things that seems to stay connected is my Amazefit Bip watch - & ironically this is the only thing that DOESN'T show up as a 'Previously connected device' under Bluetooth
To try & figure this out I've tried all the usual tricks mentioned on Google Searches (as mentioned above), as well as trying different AVRCP & MAP options under the Phones 'Developer options' (even the 'Enable Gabeldorsche' option that apprently is suppose to stabilise connections)
- Nothing I've tried lets me stay connected more than a few seconds.
As I mentioned earlier I googled a lot & I see that Android 11 has had Bluetooth connection problems for a long time (posts I've seen go back to Feb 2012) & it's not just on one particular phone manufacturer - all the solutions given are basically all the same thing repeated, which I've tried (apart from the full manufacturer reset)
But as mentioned - these are 'old posts' (a few months old) & my questions are.....
Is there a permanent 'fix' for Android 11 Bluetooth connection problem ?
Do I/Will I have to wait until a proper fix is sent ? (afaik all this has happened due to the last 'Security Update' I received)
Is there a way to 'roll-back' to the previous Security Update (remember my Phone isn't rooted) - just to prove it's the update that caused the problem ?
or am I totally 'up-the-creek-without-a-paddle' do to a muck up by Google/Android developers ?

Cannon_Foddr said:
Phone Motorola One Vision (unlocked but NOT rooted)
Recently got updated (in UK) to Android 11 ~ 24th August 2021
Received a Security Update (dated 1 August) on 1st September 2021
Problem: Bluetooth will not stay connected - phone 'sees' whatever I try to connect to, it might 'connect' but then disconnects - depending on device it may take a few attempts before giving up
Firstly before anyone says 'search for it' - I have.
I've seen many posts about Android 11 & it's 'broken' bluetooth & the many so-called temporary fixes - but nothing works for me
(Clear Cache/Data, Reset Networks, Delete/Upair & reconnect etc) - Only thing I've not done is a full Phone factory reset
When the phone got updated to Android 11 everything went smoothly, except I had to go through all my Apps & (re)give the necessary permission to SD card etc. This also meant my Car Infosystem (SYNC 3 on a 2018 Ford C-max) didn't recognise my phone - so I deleted it & reconnected it & afaik for the week I was on Android 11 the phone stayed connected without any problems.
My Bluetooth Earbuds (cheap pair off of Amazon) still worked without any sound drop-off & My Amazefit Bip watch also stayed connected (apart from the occasional 'hiccup' when the App I use gets an update)
I then received a 'Security Update' a week later & now I've noticed Bluetooth is NFG (No F-ing Good).
When I try to pair up, the device(s) are seen (whether the car, earbuds or another phone) - I get the usual 'Check Pin matches the same as...' messages & I confirm.... then the phone disconnects/reconnects/disconnects until it finally gives up
In the case of the Car connection I get additional messages such as 'Allow Access to messages - An Untrusted Bluetooth device Ford C-Max, wants to access your messages' & I also get 'Bluetooth has stopped' pop-ups
In the case of Pairing up Phones - it just connects & disconnects, sometime when trying to reconnect - it doesn't even try to connect
The ONLY things that seems to stay connected is my Amazefit Bip watch - & ironically this is the only thing that DOESN'T show up as a 'Previously connected device' under Bluetooth
To try & figure this out I've tried all the usual tricks mentioned on Google Searches (as mentioned above), as well as trying different AVRCP & MAP options under the Phones 'Developer options' (even the 'Enable Gabeldorsche' option that apprently is suppose to stabilise connections)
- Nothing I've tried lets me stay connected more than a few seconds.
As I mentioned earlier I googled a lot & I see that Android 11 has had Bluetooth connection problems for a long time (posts I've seen go back to Feb 2012) & it's not just on one particular phone manufacturer - all the solutions given are basically all the same thing repeated, which I've tried (apart from the full manufacturer reset)
But as mentioned - these are 'old posts' (a few months old) & my questions are.....
Is there a permanent 'fix' for Android 11 Bluetooth connection problem ?
Do I/Will I have to wait until a proper fix is sent ? (afaik all this has happened due to the last 'Security Update' I received)
Is there a way to 'roll-back' to the previous Security Update (remember my Phone isn't rooted) - just to prove it's the update that caused the problem ?
or am I totally 'up-the-creek-without-a-paddle' do to a muck up by Google/Android developers ?
Click to expand...
Click to collapse
Im having exactly the same problem. Looks like it's the security update. May have to wait a month to get a fix I hope.

Sorry, I have the same problem with my One Vision XT1970-3 after upgrading on android 11

Did you give Magisk Bluetooth Library Patcher a try?

Same problem on UK Moto One Vision XT1970 following update to Android 11 and subsequent security update on same dates as above..
Ford Galaxy 2018 Sync 3 keeps disconnecting and reconnecting before giving up. Same Bluetooth "check pin..." message appears.
Everything worked flawlessly under Android 10. This is definitely an Android 11 issue.
It would be great to see some positive response from Google / Android / Motorola.
dc

dc305 said:
Same problem on UK Moto One Vision XT1970 following update to Android 11 and subsequent security update on same dates as above..
Ford Galaxy 2018 Sync 3 keeps disconnecting and reconnecting before giving up. Same Bluetooth "check pin..." message appears.
Everything worked flawlessly under Android 10. This is definitely an Android 11 issue.
It would be great to see some positive response from Google / Android / Motorola.
dc
Click to expand...
Click to collapse
Not a lot unfortunately.
I posted this problem on the Lenovo/Motorola Community Support forums (3rd October) & it seems not just you & I have had this problem (& not just on Ford Sync 3 either) - it does seem to point more towards the September Security Update though
Some posters have gone & brought new phones because of this problem, & (IMHO) a couple have even been a bit brash in their comments about how poor the support is. (What DID people do before phones could connect to cars by Bluetooth??? - I remember if someone called while I was driving, I just waited until I could pull over & phone back lol)
I admit I would've liked Motorola to release a sort of mid-month 'rollback' security update or something.. maybe even allowed people with problem to download & side install (somehow) the pre-1st August update just so that they could use their phones like they did before (I think you can with a rooted phone, but mine is unrooted).
let's hope they figure it out for the October Security Update

Cannon_Foddr said:
Not a lot unfortunately.
I posted this problem on the Lenovo/Motorola Community Support forums (3rd October) & it seems not just you & I have had this problem (& not just on Ford Sync 3 either) - it does seem to point more towards the September Security Update though
Some posters have gone & brought new phones because of this problem, & (IMHO) a couple have even been a bit brash in their comments about how poor the support is. (What DID people do before phones could connect to cars by Bluetooth??? - I remember if someone called while I was driving, I just waited until I could pull over & phone back lol)
I admit I would've liked Motorola to release a sort of mid-month 'rollback' security update or something.. maybe even allowed people with problem to download & side install (somehow) the pre-1st August update just so that they could use their phones like they did before (I think you can with a rooted phone, but mine is unrooted).
let's hope they figure it out for the October Security Update
Click to expand...
Click to collapse
PJ
Cannon_Foddr said:
Not a lot unfortunately.
I posted this problem on the Lenovo/Motorola Community Support forums (3rd October) & it seems not just you & I have had this problem (& not just on Ford Sync 3 either) - it does seem to point more towards the September Security Update though
Some posters have gone & brought new phones because of this problem, & (IMHO) a couple have even been a bit brash in their comments about how poor the support is. (What DID people do before phones could connect to cars by Bluetooth??? - I remember if someone called while I was driving, I just waited until I could pull over & phone back lol)
I admit I would've liked Motorola to release a sort of mid-month 'rollback' security update or something.. maybe even allowed people with problem to download & side install (somehow) the pre-1st August update just so that they could use their phones like they did before (I think you can with a rooted phone, but mine is unrooted).
let's hope they figure it out for the October Security Update
Click to expand...
Click to collapse
Thanks for the reply. Buying a new phone is a bit extreme. I've found that simply using a cable gives all the functionality needed with the added advantage of charging en route. Need to delete Bluetooth pairing for a quiet life.
I'll wait and watch for news of a workaround or solution.
Thanks again

Question Does Bluetooth only reconnect to the last device used?

My unit allowed me to pair multiple phones (my wife and daughter also drive) but the Bluetooth system would only reconnect to the last phone used.
So if I drove the car last, and then my wife drives, it won't connect to her phone without manually selecting it from the list of devices. It will be stuck trying to find my phone which isn't in the car.
I complained to the manufacturer about this silly bug (Atoto) and they issued an update that made it search for other phones. It seems to work pretty well now, but I'm wondering - is this normal behavior for FYT units? If so, what did Atoto do to fix it? I got a Bluetooth update file, it only flashed the BT system and not the rest of Android. I'm not sure what it did, but wondering if I purchase a different FYT unit, will I run into this yet again?

dishe2 said:
My unit allowed me to pair multiple phones (my wife and daughter also drive) but the Bluetooth system would only reconnect to the last phone used.
So if I drove the car last, and then my wife drives, it won't connect to her phone without manually selecting it from the list of devices. It will be stuck trying to find my phone which isn't in the car.
I complained to the manufacturer about this silly bug (Atoto) and they issued an update that made it search for other phones. It seems to work pretty well now, but I'm wondering - is this normal behavior for FYT units? If so, what did Atoto do to fix it? I got a Bluetooth update file, it only flashed the BT system and not the rest of Android. I'm not sure what it did, but wondering if I purchase a different FYT unit, will I run into this yet again?
Click to expand...
Click to collapse
can you confirm which update you got?
is there a specific patch name i could quote when i talk to them?
i just updaed to the 2023/02/02 release and still have this issue
It's strange they did not include this bug fix in the latest firmware update
thanks for any info you can provide

How do you check for updates?

The Bluetooth 1 system is separate from the rest of the Android OS.
Bt2 is the standard Android stack that you'd normally find on a phone or tablet, But BT1, in order to receive an incoming signal from your phone, is external hardware that exists outside of Android and seems to interface via an app that they call BT1. This does not get updated the same way as the OS does.
In other words, the firmware updates are usually only targeting the Android partition and does not update the MCU, Bluetooth, or other external components. You need to ask them for a Bluetooth update, It is performed by going into BT1 and then clicking on update Bluetooth firmware from within that screen with the file on a storage card or USB. It does not format the rest of the system, it really just update BT1 alone and can be done while the device is on. However I think that they recommend you reboot after performing the update since it is pretty heavily tied into how the rest of the radio operates.
The only thing that I don't like about the way Atoto handles customer support is their updates. They say they are going to be getting better about this in the future hopefully, but right now you need to specifically ask them for updates and there is no way to check for them.

dishe2 said:
The Bluetooth 1 system is separate from the rest of the Android OS.
Bt2 is the standard Android stack that you'd normally find on a phone or tablet, But BT1, in order to receive an incoming signal from your phone, is external hardware that exists outside of Android and seems to interface via an app that they call BT1. This does not get updated the same way as the OS does.
In other words, the firmware updates are usually only targeting the Android partition and does not update the MCU, Bluetooth, or other external components. You need to ask them for a Bluetooth update, It is performed by going into BT1 and then clicking on update Bluetooth firmware from within that screen with the file on a storage card or USB. It does not format the rest of the system, it really just update BT1 alone and can be done while the device is on. However I think that they recommend you reboot after performing the update since it is pretty heavily tied into how the rest of the radio operates.
The only thing that I don't like about the way Atoto handles customer support is their updates. They say they are going to be getting better about this in the future hopefully, but right now you need to specifically ask them for updates and there is no way to check for them.
Click to expand...
Click to collapse
i have reached out to Atoto. in order to asist in getting the correct file from them, can you please quote the filename they gave you, as a the moment they dont seem to know what i am talking about. this may help them find what it is i need.
thanks in advance

@dishe2
did it take long for you to get a response form them and the file in question?
they keep responding at the speed of only 1 email per day
between 5-6 am
constantly asking more info from me about my order
instead of telling me everything they need from me
its extreemly frustrating
have you been able to find the name of the file they shared with you?
so i can let them know exactly what I am looking for?

Maybe if you share the bluetooth update files people can review what this is about as I have not heard about BT update only.

roti86 said:
Maybe if you share the bluetooth update files people can review what this is about as I have not heard about BT update only.
Click to expand...
Click to collapse
yeah, thats all i wanted, was the file/files
at least their names
anyways, support has gotten back to me
I will provide the info I have as well as what hey expect from you in case any of you need the same fix
I figure the least I can do is share the info I have
they did not give me a file to be used in the BT files menu
wha they gave me was a config.txt and lsec6316update
lsec6316update appears to be the same file that is found in a normal update and triggers an actual update process
config.txt seems to simply contain system values and their configs, some of them not even available in the hidden menu
_____the config.txt appears to be specific to your device model
this did seem to trigger a "normal" , "full" update
but as soon as it hit the fastboot/adb/update screen
it simply seemed to apply the config file and then ask to unplug the drive
it then proceedd to boot
after booting the unit will now still search for last connected phone
but if not found within ~10-15 seconds
it tries the next one in the list and so on
I have reached back to support to thank them and ask about future updates
I still sont know if this "change" will be included in the next firmare update or not
or
if at that time a different "fix" may be needd
or
if you simply need to include the config file with the nex upate, as that seems to just be part of the structure
I will follow up when i ge more answers from Atoto
now for details needed when reaching out to them
so you dont have to struggle like I did 1 email at a time with no insight
1- screenhot of the "about device" in sysem showing the MCU version
2- further deails of the MCU by tapping 4 times and scrolling to the bottom of the black screen with all the details
3- date and vendor/site your unit was ordered from
4- order number
5- exact full model number of your unit
6- screenshot showing order and unit exact model

Bluetooth reconnects OK for me, but only on days ending with y
Uis7862 mcu type 116 fyt. Rock on.

pchtc said:
they did not give me a file to be used in the BT files menu
wha they gave me was a config.txt and lsec6316update
lsec6316update appears to be the same file that is found in a normal update and triggers an actual update process
config.txt seems to simply contain system values and their configs, some of them not even available in the hidden menu
_____the config.txt appears to be specific to your device model
Click to expand...
Click to collapse
Would you care to share the contents of the config.txt file?
That appears to be something I haven't seen before.

j0hn83 said:
Would you care to share the contents of the config.txt file?
That appears to be something I haven't seen before.
Click to expand...
Click to collapse
here are the contents of theconfiguration file
nothing really sands out in terms of a parameter that would forcefully scan other paired devices, but its working now
pleas keep in mind that my unit is an A6 PF (performance)
#test
ro.fyt.launcher = com.android.launcher8
sys.fyt.bluetooth_type=1
ro.sys.touchGesture=1
sys.fyt.systemobd=true
persist.lsec.enable_a2dp=true
ro.lsec.btname=Bluetooth 2
ro.fyt.subwoof=5
ro.fyt.message=0
sys.fyt.ec_version=6
persist.sys.ahd = 1
ro.build.go_lasttop=true
ro.fyt.splitscreen=0
sys.fyt.bluetooth_show_voice=true
persist.fyt.alwaysshowsim=false
persist.fyt.showgesture=false
persist.btpair.ssp=1
ro.fyt.amsens=22
ro.fyt.def.sb.aux=2
ro.fyt.def.sb.radio=9
ro.fyt.def.sb.player=5
persist.bta2dpvol.gain=7
persist.fyt.buildnumber=AICE UI 11.0
persist.fyt.productseries=Device Name:ATOTO A6 Performance
ro.fixed.wifi=1
ro.fyt.uiid=2
persist.fyt.enablebtvoice=true
ro.fyt.backcar_radar_enable=0
# persist.syu.backui3rd = true
persist.btmic.gain=4
persist.btautoconnect.count=3
persist.syu.single360=false
bt#ATOTO#0000
# true/false ÊÇ·ñµÚÈý·½µ¹³µÓ¦Óã¬Ä¬ÈϹØ(false)
# sys.syu.reserving_service_pkg = "com.envo.mono.android"
#µÚÈý·½µ¹³µÓ¦ÓðüÃû ±±¾©Ë«÷Ùöè°üÃû£º"com.sjs.vrbackcarapp"
# sys.syu.reserving_service_action = "com.envo.mono.android.service.MonoService"
#µÚÈý·½µ¹³µÓ¦ÓÃaction ±±¾©Ë«÷Ùöèaction£º"com.sjs.vrbackcarapp.AutoStartService"

Thanks for sharing. I don't understand coding but it seems its specific for ATOTO A6 Performance. I suppose its not a copy paste for others units. It has to be adapted. I wonder why other manufactures don't apply a patch like this. Could it be hardware related?

Battoussai said:
Thanks for sharing. I don't understand coding but it seems its specific for ATOTO A6 Performance. I suppose its not a copy paste for others units. It has to be adapted. I wonder why other manufactures don't apply a patch like this. Could it be hardware related?
Click to expand...
Click to collapse
I think it is the property "persist.btautoconnect.count=3".
If you can't find the first, go to the 2nd, and optionally go to the 3rd

surfer63 said:
I think it is the property "persist.btautoconnect.count=3".
If you can't find the first, go to the 2nd, and optionally go to the 3rd
Click to expand...
Click to collapse
Hello Surfer63.
Sorry for this and i'm trying not to be a PITA but your code skills are impressive so my question (and feel free to don't reply) is:
My config.txt only contains this:
bt#VW-PHONE#0000
ro.fyt.launcher=com.android.launcher6
sys.fyt.bluetooth_type=6
sys.lsec.carplay.OTGHdPort=3
sys.syu.dvd_external=1
persist.fyt.selectcolor=3
# ÅäÖÃÀ¶ÑÀÀàÐÍ
# 0£ºÄÚÖÃÀ¶ÑÀ£»
# 1£ºRDA£»
# 2£ºIVT£»
# 3£ºWQRDA£»
# 4: WQBC5
#
sys.syu.dvd_external (9853Íâ¹ÒµúºÏ) 0,1
Should I edit and add the line you refered to "persist.btautoconnect.count=3" after the "persist.fyt.selectcolor=3"? Or it is not that simple?
Thanks in advance.

Battoussai said:
Should I edit and add the line you refered to "persist.btautoconnect.count=3" after the "persist.fyt.selectcolor=3"? Or it is not that simple?
Click to expand...
Click to collapse
First of all: I am not sure that this is the correct property. This one is also new to me, but it is not one of the other properties. So it is an educated guess that this is the correct one.
It doesn't matter where you put the line. There is no specific order. So you can put the line wherever you want in the config.txt.

Hey, OP here. Just wanted to clarify a few things:
I originally asked the question because it came to my attention that the Atoto units handle Bluetooth a little bit differently than other FYT devices.
I was curious to see how others handle it and if they have the same reconnect issues that the Atoto ones do. I'm fairly certain that very little (if anything) would translate over to other brands, however I'm not fully aware of how other brands do it (I've owned 4 Atoto units so far and can't vouch for any others aside from what I've read here). And even stranger, the "fix" differs between Atoto's own devices (the A6 PF is a 8581 devices, and the S8 is a 7862- I own both units and both have BT updates to change how this works after I explained the problem to them, however the updates are very different).
In Atoto's platform, there are two bluetooth UIs:
1) BT2, which is the standard Android Bluetooth stack. It can be used like any other BT connection in an Android device, good for things like a keyboard or other input devices, OBDii dongles, file transfers, internet tethering, etc.
2) BT1, which is a customized Bluetooth UI to act as a receiver (all the headunit-related functions such as handsfree calls and streaming audio, which aren't part of the AOSP Bluetooth stack). They call this custom one BT1, while the standard Android Bluetooth system gets demoted to BT2, probably because they assume this is the most often used one for anyone expecting headunit-style functionality.
I'm not familiar with other FYT units, but it is my understanding that they have only one unified Bluetooth system, and it is likely a customized one only which is why I see people complaining about only being able to use "official" branded OBD readers instead of allowing any standard BT connection like Atoto (@surfer63, is that about right?).
I'm not 100% sure how it works, but it appears that BT1 might actually rely on separate hardware that exists externally from the rest of the Android system, and only interfaces with it via an app (similar to the way the FM tuner works). Essentially it is a Bluetooth receiver that goes into the MCU mixer and controlled inside the app called BT1. The proof to me that this is the case is that:
1) You can "see itself" when searching for bluetooth devices in BT2. I haven't tried this because it feels like a paradox that would unravel the universe at first, but apparently BT2 can see BT1 as an available Bluetooth speaker, and connect to it for audio.
2) After a factory reset, BT1 retains its paired devices information (because it exists outside of Android).
3) BT1 UI has its own "reset" and sometimes even "update" function (S8 Ultra, more on that in a minute), which implies it is operating on a different set of rules than the rest of the system.
When they initially made the update for my S8 Ultra, I was given a file to "flash the firmware of the bluetooth module". It is NOT a system update, but an update that must be initiated only inside of BT1. It does not effect the rest of the system, it does not even reboot the system. You click update, wait for it to finish, then click reset Bluetooth for good measure.
On the A6 pf (5851 device), I was given an actual firmware update to test when they "fixed" it. And not just a new lsec6316update and config file, but a full blown update. It could be that the rest of the update wasn't necessary and just a line in the config was changed, but I'd doubt that since they said the unit currently did not work the way I asked, and their engineers had to "work on a fix".
Either way, the bottom line here is that the Atoto units work different from each other (S8 vs A6 pf) and both of those work differently from every other FYT device I think, so none of this is cross-device useful IMO. I believe this is why they recommended I tell people to contact customer support rather than share the fix online for others, it appears to be very device specific. And for the record, it works much better on the S8 than the A6. The A6 gets stuck if it sees the previous device when it boots up, whereas the S8 can tell when it gets disconnected to start searching for other previous devices. The systems don't work the same way.

dishe2 said:
I'm not familiar with other FYT units, but it is my understanding that they have only one unified Bluetooth system, and it is likely a customized one only which is why I see people complaining about only being able to use "official" branded OBD readers instead of allowing any standard BT connection like Atoto (@surfer63, is that about right?).
Click to expand...
Click to collapse
The FYTs do indeed have one BT app and a "crippled" bluetooth stack. As I do not have an Atoto I can't say anything about the other parts of your theory/explanation, other then that it sounds quite logical.

dishe2 said:
.'m not familiar with other FYT units, but it is my understanding that they have only one unified Bluetooth system, and it is likely a customized one only which is why I see people complaining about only being able to use "official" branded OBD readers instead of allowing any standard BT connection like Atoto
Click to expand...
Click to collapse
Other FYT units operate the exact same.
They have 2 Bluetooth systems installed that behave the same way as your Atoto.
Either way, the bottom line here is that the Atoto units work different from each other (S8 vs A6 pf) and both of those work differently from every other FYT device I think, so none of this is cross-device useful IMO
Click to expand...
Click to collapse
The config.txt commands to change the behaviour of the Bluetooth pairing are FYT config lines and shouldn't be specific to Atoto.
I'll have a play with my unit later and try see how they change the behaviour but I suspect they will have similar outcomes.

j0hn83 said:
Other FYT units operate the exact same.
They have 2 Bluetooth systems installed that behave the same way as your Atoto.
Click to expand...
Click to collapse
@dishe2 mentions "In Atoto's platform, there are two bluetooth UIs:"
On my Mekede 500s I only have one 190000010_com.syu.bt.apk, and it doesn't have an alternative UI for "BT1" and "BT2". Neither is there an second BT apk, nor can I access it from the Settings.
This is already a 7 year old issue that prevents us to connect anything else than the "allowed" BT devices.
Can you please explain how I get to the other other UI with the standard BT functionality?

On my Mekede M500s you can access "Bluetooth 2" by using Marios shortcut app or using his FYT management centre app.
It's a completely separate Bluetooth chip to the BLINK Bluetooth app that handles calls (190000010_com.syu.bt.apk).
The 2 Bluetooth devices have different mac addresses.