[Completed] SM-N900P gps problem - XDA Assist

Sorry, I post message in a wrong place. This is the first time I post anything on the web. I have a Samsung Note 3 model SM-N900P which does not have any GPS signal with a SIM installed (I tried both carrier ATT and T-Mobile). With the SIM removed more than 12 satellite signals locked with GPS status & fix app and the google map works great.
Samsung SM-N900P:
• Cyanogen mode 12.1.1
• MJ4 modem
• Super user 2.7 Chainfire.
Troubleshooting steps:
• Checked and cleaned all clips and ribbon cable from/to the main board.
• Download GPS signal & fix app. Without a SIM card installed I have more than 10 satellite locked and google map work.
• Installed T-Mobile SIM and I lost all GPS signal. Replaced T-Mobile SIM wit ATT and got the same result.
• Replaced gps.conf file in the system/etc directory with a file that I copied from a working Note 3 (original stock ROM).
• Edit gps.conf file according to couple suggestions from the web.
Nothing works so far and I am ready to replace the ROM back to stock ROM. The question is what stock ROM that I should use since the current ROM is lollipop 5.1.1 and the original one was KitKat (when I bought the phone).
I am still in the learning process and need all the inputs, Thank you for your time and your help is greatly appreciated

Gps
Never mind, found the solution

Related

[Q] CM9 Alfa 17 data not working

I followed directions to wipe everything as suggested in this post:
http://forum.xda-developers.com/showpost.php?p=20485148&postcount=146
Was using Alfa 13 just fine, but on Alfa 17 I can not get cellular data to work. Confirmed my WAP settings are correct for my carrier.
My baseband it says its a i9020xxkf1 and everything else on the phone works. I can access the market, wifi works, account sync if i have wifi on. I have doubled checked every possible setting. But it will not bring up a data connection over the cellular radio. It even takes calls over the radio. Just no data connectivity.
Any suggestions or reasons why this is occurring? I can easily swap back to an older nandroid image of alfa 13, but I would really like to get on a new version etc.
(Also, I would have made this post in the right dev section, but i lack 10 posts to gain access to it.)
Have you tried removing and replacing your SIM card ?
Also, check if your data counter has a limit set on
You could also manually configure your APN settings with your carrier's settings
Unfortunatly I have done all of those things. It doesn't even attempt to connect to data. I sit at 4 or 5 bars of signal and it never even connects to EDGE/3g at all. Yet if I flip back over to my older image it works flawlessly.
i have also problem with version 17, but i can't post it to developer forum (newbie here)
problem is that i can't hook on any network, no calls no messegas, i'm using croatian tele2/t-mobile....sometimes it connects but still nothing, no calss etc.
also problem (not so much a problem but a solution) when i installed ROM it went to bootloop, all you have to do is remove battery and power up again, and voila, it works, same problem happened when i installed gapps (same solution worked, everything installed from CWM latest version)
there were also posts regarding cwm not stiking after installing cynogen, i had no problem with it, i have latest cwm 5.0.2.3 (think so), sticks like hell tried couple of roms, still sticking
cheers
I have the same problem here... ICS 4.0.3 and my 3G stopped to work.
also tried new 18 version, still no luck, i'm staying on cynogenmod 7 (GB), only ICS version that worked was MUI but i don't like it very much....
http://forum.xda-developers.com/showthread.php?t=1398691
It has been messed around with a fair bit. Various methods have worked for different people. YMMV. I myself had such an issue with the stock FW (of all FWs...).

htc hd mini - workaround to fix GPS on 4.0.4. ICS from munjeni

hi! today i've found a working solution for all users with non working GPS!
I know, my GPS has worked unter WM and the android SD Version update-cm-7.2.0-RC0-photonic-KANG-signed.
After the switch to 4.0.4. munjeni's ICS and the latest GPS Patch, on my phone GPS will not work!
after my search for a reason for a corrupt GPS i've tried some workarounds.
also to reinstall WM6.5!
the interested thing, also under WM, GPS is no more working. (windows is seaching and seaching ...... )
i've found a interesed note: http://forum.xda-developers.com/showthread.php?t=1498693
it seems GPS was blocked from an older andriod version!!!!!
in my case - the SD version you can see in the first line.
now i've reactived the saved SD version, start the GPS in google maps, it takes some secounds to found my location via GPS.
in this active state and working GPS, i've removed the battery!
flash back to the new LK and restored my whole saved ROM include the GPS fix!
after the boot, start your navi-software or google maps - now your GPS should works fine - you can see the icon in the left corner!!
also the sw tells me, my location was set by GPS!
thats great!
I hope, i could help all other users with munjeni's great custom rom 4.0.4. ICS!
PS: not working is his blue camera fix! -
I use the solution to modify the file to get the right result (but blue preview). that is ok for me!
also i can live with the 3G bug! If i want to google, I activate 3G and after browsing, i switch back to 2G.
bad is the mono audio! i hope, we will get an update soon!?
howto
mini howto:
to check, if your GPS blocked, save your current ROM!!
flash your original WM to your fon and look in google maps, if GPS find any satellites.
in my case, it does not found any satellites. (but it activated the GPS Modul).
the device was there, but it seems blocked!
now you have to flash to the Android ROM as you know, your GPS works correctly!
start that ROM and activate the GPS with an application (like google maps or an navigator software)
in my case, gps founds satellites during some seconds (10 or 20 seconds)
also the ROM tells me, my location was set through GPS.
in this state, you have to remove the battery!!!!
flash back to the latest LK and restore your ROM from the first!
boot, start google maps or navi and you will see the GPS in the left upper corner on your hd mini.
have fun and be happy
Thank you!
Thank you very much, dear pinky999!
Your solution helped me to re-enable GPS on my mini!
After reading your post I first tried the latest sdcard version I used - photonic CM 7.2 (this had no effect),
and then tried another sdcard android that I used before photonic - r175 with sense - AND THIS DID THE TRICK! HOORAY!
Thank you once more

FIXED - Freedompop (Sprint), 4G/LTE and custom ROM

It appears that 4G doesn't work with FreedomPop and most custom ROMs. It seems like either custom roms are detected by FreedomPop and disactivated from 4G, or (more likely) most ROMs have the wrong 4G information wrong for FreedomPop.
It could well be that most roms incorrectly detect the FreedomPop 4G network as Sprint. I know a similar problem exists with Credo Mobile, in which case changing the APN network information solves the issue.
Moreover, on reddit someone claims 4G works on cyanogen 7 but not on later version. Maybe that could help solve the issue?
I'd be very happy if one of you could help me figure what is wrong, or if you got 4G to work with a custom ROM on FreedomPop.
Solved!
Basing myself on the Boost Mobile APN fix, I made a new fix that should give 4G/LTE to FreedomPop users.
Download the FreedomPop fix here.
Just download the fix, put it on your phone, boot into your recovery (I suggest Philz), select Install Zip, and install the fix.
This new fix, compared to the previous one has the benefit of providing an extra APN (n.f6.ispsn) that should give superior performances. Moreover, the fix should be more robust, being based on the Boost Mobile fix instead of the Ting fix. Finally, it will also display "FreedomPop" (instead of Sprint) as your provider.
The previous method is also listed here in case it is of interest to you.
Previous method:
I found a way to get 4G on FreedomPop with Cyanogenmod 11! Just follow these simple instructions:
1. Download the Ting APN fix for Android 4.4 on your PC
2. Unzip the Ting APN fix somewhere.
3. Replace the apns-conf.xml file in system/etc/ directory of the unzipped Ting APN fix with this file: http://www.mediafire.com/view/25xozc3p6okf8zw/apns-conf.xml
4. Re-zip the Ting APN fix (with the modified apns-conf.xml), and put in on your phone.
5. Boot to Philz recovery, select Install Zip, and install the modified Ting APN fix. Voila! 4G/LTE should work (make sure to enable it in settings/mobile networks!)
Note that this will work on the S3, but may not work on other phones. To obtain proper apns-conf.xml file, I recommend you flash to 4.3 stock rom, and copy the apns-conf.xml file from /system/etc/apns-conf.xml file of your android and use that instead for step 3.
Freedompop phone to a Sprint Account
Hey guys, I have a nice Freedompop Galaxy s3 that came straight from FP rooted with their proprietary ROM. But the FP ROM is designed to use VOIP to make all calls and seems to do away with any actual cdma(?) dialer altogether. It's a nice phone for $200.00 and I think I'd like to keep it. But when I tried to activate it on my Sprint account, they get an error on their end and don't recognize it.
This question is for you hardcore developers out there. How can I completely reprogram it to a rooted sprint firmware with a dialer and activate it in place of my older HTC 4G LTE. But also "save" the FP ROM for restore if it won't activate. I have til October to return it, so I thought I'd play.
You should also know 1) that FP definitely runs on the sprint network and seems to work exclusively through their 3g/4g lte service (hence the proprietary ROM and no solid phone connectivity); 2) this galaxy is marked as "refurbished" (in pristine condition) and has no Sprint logo on it all (they asked me about this on the sprint chat site); 3) the battery drained pretty fast and the phone would get warm (my HTC never had these issues, though it seems to be common among s3 owners); 4) but all that being said, it's super fast (cf. to EVO) and I think I might enjoy the upgrade at this price.
Thanks for thinkin on it.​Masterhanger
masterhanger said:
Hey guys, I have a nice Freedompop Galaxy s3 that came straight from FP rooted with their proprietary ROM. But the FP ROM is designed to use VOIP to make all calls and seems to do away with any actual cdma(?) dialer altogether. It's a nice phone for $200.00 and I think I'd like to keep it. But when I tried to activate it on my Sprint account, they get an error on their end and don't recognize it.
This question is for you hardcore developers out there. How can I completely reprogram it to a rooted sprint firmware with a dialer and activate it in place of my older HTC 4G LTE. But also "save" the FP ROM for restore if it won't activate. I have til October to return it, so I thought I'd play.
You should also know 1) that FP definitely runs on the sprint network and seems to work exclusively through their 3g/4g lte service (hence the proprietary ROM and no solid phone connectivity); 2) this galaxy is marked as "refurbished" (in pristine condition) and has no Sprint logo on it all (they asked me about this on the sprint chat site); 3) the battery drained pretty fast and the phone would get warm (my HTC never had these issues, though it seems to be common among s3 owners); 4) but all that being said, it's super fast (cf. to EVO) and I think I might enjoy the upgrade at this price.
Thanks for thinkin on it.​Masterhanger
Click to expand...
Click to collapse
If I understand the issue, you got yourself a FreedomPop phone that you wish to activate with Sprint (NOT with FreedomPop)?
If so, I see two potential issues:
1. Your phone IMEI is with FreedomPop, and thus no longer recognized by Sprint. You'll have to ask Sprint to get your IMEI back, if possible.
2. You are using a FreedomPop ROM, and that ROM doesn't allow Sprint activation. Hopefully the actual phone is the same as the Sprint version and only the ROM is different. If you go to Settings and the model number is SPH-L710 then you are probably good. Try installing a Sprint stock ROM and then activate. I strongly recommend you backup your entire phone (including boot and efs) before you do that through, preferably through Odin - but be warned that you may hard brick your phone.
Works, but no sprint optimizer, profile update, or PRL
Hey Merudo,
I really appreciate the fix, thank you for that! However, as you can see in the title, there is no sprint optimizer, profile update or PRL update. That is really important stuff as the networks changes and upgrades all the time. Is there any way that file can be included too? Maybe I'm missing something, but the Tink fix said that there should be a sprint network update for the profile and PRL next to the CyanogenMod updates in About phone in the settings, but I never saw that when I put that on my phone. I have a Galaxy S3 phone I bought from freedomPop, but I absolutely hated the Samsung ROM so I wanted to flash CyanogenMod and now I'm having problems. I hope you have some ideas or can clear things up. Thanks again for the fix, and I saw your post on CyanogenMod site about this, that would be awesome if they did put this file into the ROM!
ColdHot said:
Hey Merudo,
I really appreciate the fix, thank you for that! However, as you can see in the title, there is no sprint optimizer, profile update or PRL update. That is really important stuff as the networks changes and upgrades all the time. Is there any way that file can be included too? Maybe I'm missing something, but the Tink fix said that there should be a sprint network update for the profile and PRL next to the CyanogenMod updates in About phone in the settings, but I never saw that when I put that on my phone. I have a Galaxy S3 phone I bought from freedomPop, but I absolutely hated the Samsung ROM so I wanted to flash CyanogenMod and now I'm having problems. I hope you have some ideas or can clear things up. Thanks again for the fix, and I saw your post on CyanogenMod site about this, that would be awesome if they did put this file into the ROM!
Click to expand...
Click to collapse
Hi ColdHot,
Sadly, profile/PRL update on custom ROM is a problem on all Sprint providers (Including Boost, Credo, FreedomPop, Ting, Virgin Mobile, and Sprint itself).
As far as I know, no custom ROM has built-in support for profile/PRL update for any of these providers.
I believe most people deal with the issue by switching back to a stock rom each time they wish to update profile or PRL. I personally switch back and forth between two full backups I make with Philz Touch Recovery.
Please do tell me if you ever find a better way!
Merudo said:
Basing myself on the Boost Mobile APN fix, I made a new fix that should give 4G/LTE to FreedomPop users.
Download the FreedomPop fix here.
Just download the fix, put it on your phone, boot into your recovery (I suggest Philz), select Install Zip, and install the fix.
This new fix, compared to the previous one has the benefit of providing an extra APN (n.f6.ispsn) that should give superior performances. Moreover, the fix should be more robust, being based on the Boost Mobile fix instead of the Ting fix. Finally, it will also display "FreedomPop" (instead of Sprint) as your provider.
The previous method is also listed here in case it is of interest to you.
Previous method:
I found a way to get 4G on FreedomPop with Cyanogenmod 11! Just follow these simple instructions:
1. Download the Ting APN fix for Android 4.4 on your PC
2. Unzip the Ting APN fix somewhere.
3. Replace the apns-conf.xml file in system/etc/ directory of the unzipped Ting APN fix with this file: http://www.mediafire.com/view/25xozc3p6okf8zw/apns-conf.xml
4. Re-zip the Ting APN fix (with the modified apns-conf.xml), and put in on your phone.
5. Boot to Philz recovery, select Install Zip, and install the modified Ting APN fix. Voila! 4G/LTE should work (make sure to enable it in settings/mobile networks!)
Note that this will work on the S3, but may not work on other phones. To obtain proper apns-conf.xml file, I recommend you flash to 4.3 stock rom, and copy the apns-conf.xml file from /system/etc/apns-conf.xml file of your android and use that instead for step 3.
Click to expand...
Click to collapse
OH MY GOODNESS THANK YOU SO MUCH MAN!!! I've seriously tried everything to get my 4G to work on my cyanogenmod infused freedompop (although its a sprint deivce) even by inputting my own apn's I found on the web. I was seriously even considering switching back to sprint just because 3g speeds just weren't cutting it. This finally did the trick. Thanks so much!
So ur fkashed to boostmobile with a freedom pop lte card in getting 4g lte? And boostmobile 3g and voice??
Sent from my SM-G900P using Tapatalk
Wicked X on Freedompop
I was running Wicked Sensations when I switched to FP. Nothing but headaches all around. Couldn't place calls off wifi, no 4G, PRL or Profile updates. FP support was useless at trying to resolve.
I then switched to Wicked X and the phone is running smooth. Optimizer, 4G, PRL and Profile updates are all working fine. I'm getting better battery life than my wife's phone we just purchased from FP running their ROM. Seems to be a good ROM so far for FP service.
Thanks, Merudo.
For anyone wondering, I applied this on a 5.0 rom on my S3 and it seems to work great.
usjbm said:
Thanks, Merudo.
For anyone wondering, I applied this on a 5.0 rom on my S3 and it seems to work great.
Click to expand...
Click to collapse
thanks for your information,
can you set the messaging (from freedompop) as defaulted dialer?
I tried the cynammod rom, when I used messaging app to dial the original dialer alway launched out, it is very annoying, so I have to flash back to freedompop rom.
has 5.0 the same problem? thanks!
New Fix Disclaimer
Hey Merudo,
I may get an S4 to use with FP and noticed your old fix had a disclaimer that it may not work on non-S3s. Could you clarify if the new fix has the same disclaimer? I see your comment in the .sh file says it handles universal lte builds but just want to make sure before purchasing otherwise I'll probably just go with an S3.
Not working... loosing my mind=(
I just moved and should be looking for work but, instead, I'm loosing my mind trying to make this work on my Sprint S4 running and, albeit, weekly build of CM12. For the love of god, has anybody figured anything out with that? It's really hard to network when I have no way of getting back to people. Not to mention how much I just spent on this phone.
Please help
I haven't been able to get any APN fix to work for freedompop on any Lollipop rom on my S4.
I get 3G without applying any fix, and either nothing happens, or I can't connect at all when using one of the 3 APN fixes I found.
Not sure why they don't work.
Can't seem to get data 3G/4G to work.
Can't seem to get data 3G/4G to work. When I disable wifi, I lose my Sprint(Freedompop) connection. I cant connect to the internet, etc.
I've tried these so far but nothing worked for me:
Universal_vmu_ApnFix-v.R2.zip
Freedompop APNs fix.zip
I love how fast this ROM is and want to make it my daily use phone.
Is there a specific process for getting it to work? Just want to make sure I'm not missing something.
Any advice/help is appreciated.
Freedompop (Sprint) SPH-L710 (Samsung Galaxy S3)
CM version 12-20150120-UNOFFICIAL-d2spr (lollipop 5.0.2 unofficial)
Baseband version: L710VPUDND8
EDIT: Is there a specific way to install to get it to work or? Or any other info I can provide that will help?
My current install went like this: wipe cache, wipe devik, factory reset, install CM12 ROM, install Freedompop APNs fix.zip, install gapps-1p-20141109-signed.zip, install Freedompop messaging, confirm registration, disable wifi, and no 3g/4g.
030415 Edit: My issue is resolved! I dialed *#*#4636#*#* and the TESTING screen came up immediately. Under "Set preferred network type:", I switched it to: LTE/GSM/CDMA auto (PRL) in the dropdown menu. I then turned off my WIFI, and LTE immediately showed up! I tested going to a webpage and it works!! I cannot thank you (shakim24 and XDA) enough!!! Turning the WIFI back on is a little tricky and requires some patience, but it will come back on. :good: :victory: :highfive:
Works for Nexus5 CM12 weekly
I am using multi rom with stock as the primary rom. I used that to update PRL and everything works as expected without any modifications. However, the CM12 data settings did not work without the FIX attached in this thread.
What ROM?
usjbm said:
Thanks, Merudo.
For anyone wondering, I applied this on a 5.0 rom on my S3 and it seems to work great.
Click to expand...
Click to collapse
Can you tell me what ROM you used, because I have not been able to find one for my S3
Should I download the fix from the attachment or on the link?
They seem to be different.
UPD: one in attachment seem to be better (more settings in the apns-conf.xml)
I'm also attaching another version of this fix with even more APNs for Freedompop. It equals the setup that came with original FreedomPop ROM
i am having same issue and none of these PRL's work. Can you tell me which fix you used before modifying the settings in TESTING menu
---------- Post added at 11:10 PM ---------- Previous post was at 11:08 PM ----------
donclark said:
Can't seem to get data 3G/4G to work. When I disable wifi, I lose my Sprint(Freedompop) connection. I cant connect to the internet, etc.
I've tried these so far but nothing worked for me:
Universal_vmu_ApnFix-v.R2.zip
Freedompop APNs fix.zip
I love how fast this ROM is and want to make it my daily use phone.
Is there a specific process for getting it to work? Just want to make sure I'm not missing something.
Any advice/help is appreciated.
Freedompop (Sprint) SPH-L710 (Samsung Galaxy S3)
CM version 12-20150120-UNOFFICIAL-d2spr (lollipop 5.0.2 unofficial)
Baseband version: L710VPUDND8
EDIT: Is there a specific way to install to get it to work or? Or any other info I can provide that will help?
My current install went like this: wipe cache, wipe devik, factory reset, install CM12 ROM, install Freedompop APNs fix.zip, install gapps-1p-20141109-signed.zip, install Freedompop messaging, confirm registration, disable wifi, and no 3g/4g.
030415 Edit: My issue is resolved! I dialed *#*#4636#*#* and the TESTING screen came up immediately. Under "Set preferred network type:", I switched it to: LTE/GSM/CDMA auto (PRL) in the dropdown menu. I then turned off my WIFI, and LTE immediately showed up! I tested going to a webpage and it works!! I cannot thank you (shakim24 and XDA) enough!!! Turning the WIFI back on is a little tricky and requires some patience, but it will come back on. :good: :victory: :highfive:
Click to expand...
Click to collapse
i am having same issue and none of these PRL's work. I am on CM 12.1, can you tell me which fix you used before modifying the settings in TESTING menu
Update : i finally got it working with flashing the PRL in first post but the phone works only when Data is enabled. when Data or wifi is switched off, i am not able to make or receive any calls. Does anyone has the same issue.
ajeevlal said:
i am having same issue and none of these PRL's work. Can you tell me which fix you used before modifying the settings in TESTING menu
---------- Post added at 11:10 PM ---------- Previous post was at 11:08 PM ----------
i am having same issue and none of these PRL's work. I am on CM 12.1, can you tell me which fix you used before modifying the settings in TESTING menu
Update : i finally got it working with flashing the PRL in first post but the phone works only when Data is enabled. when Data or wifi is switched off, i am not able to make or receive any calls. Does anyone has the same issue.
Click to expand...
Click to collapse
You can only make/receive calls when Data is enabled? It doesnt work via wifi? While data is turned off, open the Freedompop Messaging app and see if indicates that you are registered. What happens specifically when you try to make a call? (what errors or messages do you get)

Epic GPS not working problem, on MT65xx devices after flashing, can it get a fix?

So you already tried everything that's available on the web to fix your Chinese phone GPS after a stock/custom ROM Flashing, and problably your device is a MT6572, MT6577, MT6582, MT6589(T), MT6592, MT6753 or any other media tek.
You already tried:​
1 - The classic method, that shouldn't even be mentioned in a case like this, and felt like an idiot:
* DOWNLOAD EPO AND ENABLE AGPS.
2 - The Plan B Method: Used Faster GPS app to create or manually changed your GPS.config file.
3 - The plan C Method: Deleted mtkgps file and restarted.
4 - The plan D Method: Searched for a NVRAM file on the Web and tried to restore it using MTK Tools.
5 - The plan E Method: You downloaded/replaced the file libmnlp_mt6572 in your system/xbin folder.
6 - The plan F Method: You Downloaded/replaced the files mtk_agpsd from bin folder, agps_profiles_conf.xml from etc folder, android.hardware.location.gps.xml from etc/permissions folder, gps.default.so from lib/hw folder and mtk_stp_gps.ko from lib/modules folder.
7 - The plan G Method: Perhaps you tried some African ritual...
8 - You climbed Mount Fuji to get some signal, and had to keep your screen ON in the GPS APP during 2 hours.
9 - You tried some Native Indian ritual...
10 - You hacked you GPS Antenna, building a custom one as it is shown YouTube tutorials, and it works... for the guys who made the videos.
Your GPS was working before flashing, even if weak, so you know your hardware is not broken or something.
11 - You tried to transform into Mumm Ra the ever living!
12 - Like me, it's been over 1 week since you decided to fix this issue, and you're about to pull all your hair. In my case I'm spending hours on this, I'm really trying to get a solution.
AND NOTHING WORKED AFTER DELETING, REPLACING, DOWNLOADING.
You even learnt and tried using EXPELLIARMUS!!!
Still didn't work...​
And your GPS still can't get a lock, even with all the network aid, all the tutorials you found in the web. If you religious, you even asked Jesus to help you (At least that was my case). But your phone is still the same.
Now you feel like an idiot that is never, ever again going to buy another Chinese phone anymore in your life, but you don't want to discard your phone, what you're going to do?
Well I -- STILL -- haven't found a solution, but I found a clue that may lead to a solution. Since I'm not a smart ass programmer that knows basically everything about Androids, I humbly come here now to open this discussion and see if we can finally find a solution for this problem that I believe it already annoyed at least 1 hundred people around the globe.
My clue is:
1 - I saw some people saying that when they restored their NVRAM backup after flashing the stock ROM, they got their GPS working again. So it is related to NVRAM, but with what in NVRAM?
2 - Today I was testing some hacks, when I disabled my SIM card, I the GPS TEST app could not find any satellites anymore, and I was using wifi, so it makes no sense at all, I mean, could the GPS be using the 3G/GMS/WCDMA band?
I believe the GPS device is operating in a different frequency, probably the same as the SIM CARD, and that's why people can't get a lock.
That's related to NVRAM. Perhaps with the 900/2100 and 850/2100 operator frequencies.
Let's discuss and see if we can find a definitive solution for this case, please.
Found this in another forum:
we were discussing this point also in the thread regarding unlocking the 3G bands.
it seems that neither the NVRAM nor the ROM alone has much effect regarding to the GPS, but it seems that if either one does not match the other you can also have trouble with your GPS.
how it's connected i do not know - actually as you said it should not be connected at all.
but it's pretty much clear now that the 850/2100 and 900/2100 phone have at minimum different radio hardware.
We were not able to determine how the bands were locked/opened through the firmware (since it would make sense that in theory both are available but can be turned on or off by the manufacturer, because its more expensive for MTK to produce actually different radio hardware) so that suggest that there is a hw difference. that could be connected to the GPS also.
in other threads people had reported that by upgrading the firmware they nuked their NVRAM (lost IMEIs, changing MAC address etc.) and most of them had problems with the GPS afterwards.
better safe than sorry. if you really want to try this out, please make sure to have a working backup of your NVRAM beforehand.
Click to expand...
Click to collapse
So a site about developers doesn't have a developer that could ever solve that issue?

GPS without Sim Card on Samsung Ace2 CM11 (A2N/Ace2Nutzer)

Hi everyone,
i flashed on may Ace2 the current (20190202) CM11 Rom from Ace2Nutzer with the latest Kernel (20190521) on a GT-I8160P (NFC Version). I also applied GT-I8160P_Support_V2.6.zip patch. I want to use the device as offline navigation system using Here Maps. I didn't install any Google Apps or services.
The problem is GPS isn't working when no sim card is in the device. It doesn't find one satellite signal. I'm using "GPS Status" App to watch the GPS activity.
So my question is: Do I need gapps to get GPS working or why isn't it working without a sim. However when I insert a sim card he picks up a GPS signal.
Does anyone have a idea what could be wrong or a hint what i should try?
Thanks,
Chris

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