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weird LTE performance on my N5

Hi there.
I have just got a used-N5 on the Internet. It is a D821 (for Indonesia market I think).
Everything is fine except the LTE connection. (2G and 3G connection is normal)
The LTE problem is:
The searching speed is slow.
Even if LTE is connected, the response time and connection speed is extremely slow.
I have taken out my SIM card, and insert it into another N5 (D821) right next to this phone.
The speed is 10 times faster.
I am using CSL in Hong Kong, which the LTE is band 3 and 7 (1800 / 2600).
Baseband is updated to the latest version.
APN setting is correct.
No matter which ROM and kernel I use, the LTE problem exists.
Anyone have idea how to fix it?
Thank you very much!

y2kbugleung said:
Hi there.
I have just got a used-N5 on the Internet. It is a D821 (for Indonesia market I think).
Everything is fine except the LTE connection. (2G and 3G connection is normal)
The LTE problem is:
The searching speed is slow.
Even if LTE is connected, the response time and connection speed is extremely slow.
I have taken out my SIM card, and insert it into another N5 (D821) right next to this phone.
The speed is 10 times faster.
I am using CSL in Hong Kong, which the LTE is band 3 and 7 (1800 / 2600).
Baseband is updated to the latest version.
APN setting is correct.
No matter which ROM and kernel I use, the LTE problem exists.
Anyone have idea how to fix it?
Thank you very much!
Click to expand...
Click to collapse
Questions belong in Q&A.
Every D821 is the same, every D820 is the same. There are no specific regional versions for a D821.
The ROM and kernel have nothing to do with your network connectivity.
Try flashing a different radio version.

Lethargy said:
Questions belong in Q&A.
Every D821 is the same, every D820 is the same. There are no specific regional versions for a D821.
The ROM and kernel have nothing to do with your network connectivity.
Try flashing a different radio version.
Click to expand...
Click to collapse
Excuse me, do you mean try flashing a different baseband version?
I have tried the one comes with Kitkat (4.4.4) but no luck.
I know every D821 should be the same, but I just wonder why under same configuration (ROM, kernel, baseband), but the result is different.
I suspect if my D821 is a remarked D820.
Thanks.

y2kbugleung said:
Excuse me, do you mean try flashing a different baseband version?
I have tried the one comes with Kitkat (4.4.4) but no luck.
I know every D821 should be the same, but I just wonder why under same configuration (ROM, kernel, baseband), but the result is different.
I suspect if my D821 is a remarked D820.
Thanks.
Click to expand...
Click to collapse
Yeah, radio and baseband are the very same.
With the exact same software, the result can be different because not every device is made the same; the perfect Nexus 5 does not exist.
The only difference between a D821 and a D820 are the LTE bands it can access, everything else including the 2G/3G bands are the same. If it was actually a D820, you'd probably get no LTE at all, unless your carrier supports one of the bands a D820 can access; it would not mean you get "slower" or "worse" LTE performance - you'd either get it or you wouldn't.
It might just be a hardware issue if you think it's slow.

Lethargy said:
Yeah, radio and baseband are the very same.
With the exact same software, the result can be different because not every device is made the same; the perfect Nexus 5 does not exist.
The only difference between a D821 and a D820 are the LTE bands it can access, everything else including the 2G/3G bands are the same. If it was actually a D820, you'd probably get no LTE at all, unless your carrier supports one of the bands a D820 can access; it would not mean you get "slower" or "worse" LTE performance - you'd either get it or you wouldn't.
It might just be a hardware issue if you think it's slow.
Click to expand...
Click to collapse
I believe it is a hardware issue as well
If someone on xda give me a hope then I don't need to bargain with the shop
Thanks :good:

Hi all.
Last night I have brought it to the shop and tested there.
The LTE speed is very normal... I cannot trigger the problem by any means...
I suppose it to be the signal reception issue.
I left the shop and found the speed might be somehow dropped, but it could be still considered as normal.
I went home, re-flash another ROM and prepare for normal use.
However, the LTE becomes abnormal again...
I have found an interesting thing.
I have flashed stock ROM and OEM LOCK before bringing back to the shop, and it is normal speed.
I went home, OEM UNLOCK and flashed a custom ROM, it is abnormal.
Now, I have just re-flash the STOCK, and the LTE is not so normal.
But after OEM LOCK, it seems to be fine.
I believe there is no relation, but is it possible the OEM LOCK to do with the LTE issue?
Thanks. :crying:

y2kbugleung said:
Hi all.
Last night I have brought it to the shop and tested there.
The LTE speed is very normal... I cannot trigger the problem by any means...
I suppose it to be the signal reception issue.
I left the shop and found the speed might be somehow dropped, but it could be still considered as normal.
I went home, re-flash another ROM and prepare for normal use.
However, the LTE becomes abnormal again...
I have found an interesting thing.
I have flashed stock ROM and OEM LOCK before bringing back to the shop, and it is normal speed.
I went home, OEM UNLOCK and flashed a custom ROM, it is abnormal.
Now, I have just re-flash the STOCK, and the LTE is not so normal.
But after OEM LOCK, it seems to be fine.
I believe there is no relation, but is it possible the OEM LOCK to do with the LTE issue?
Thanks. :crying:
Click to expand...
Click to collapse
Bootloader lock/unlock state has absolutely nothing to do with your issue.
The ONLY difference between having it locked/unlocked is so you can flash images. It does NOT affect anything else.

I am a web programmer. I always suspect something strange when something cannot be explained (bugs in coding, I mean)
I have tested several times today. Locked bootloader still gives a poor LTE result.
I really have no idea why there is LTE problem...

y2kbugleung said:
I am a web programmer. I always suspect something strange when something cannot be explained (bugs in coding, I mean)
I have tested several times today. Locked bootloader still gives a poor LTE result.
I really have no idea why there is LTE problem...
Click to expand...
Click to collapse
Again, bootloader state affects nothing but the ability to flash images.

Yes I understand.
Just trying everything to find out a reason...

No LTE in some ROMs

Hello. My issue is that my phone won't connect to LTE in stock ROM, but it connects with CM 12.1. But my main "concern" is that it used to connect to LTE using stock ROM... To make the long story short: when I bought the phone, it only connected to H, even if I selected LTE in Preferred Network Type (selecting LTE there even made, and still makes my data connection unstable, getting disconnected and rapidly connecting to data network, but only uses H network type) so I selected 3G, because it was made my connection stable.
Then, after some time, I decided to try and select LTE again, and it connected to LTE! Good, fast, stable connection. But after some weeks, I had to wipe my data partition, and again... it would't grab LTE. Some days ago, I flashed CM ROM, and I was surprised that it grabbed LTE with it again. And today, I decided to flash stock ROM again because CM gave me some problems with moto apps (I had to wipe data because it entered in a bootloop), and again, no LTE in stock ROM.
My question is, what can be causing this behavior? I didn't do anything to purposely fix data connection and use LTE, and my phone is capable of connecting to my carrier LTE band (i tested the speed when I was on LTE and yes, it was a lot faster than H), so it should be some ROM/software related issue. I tried to reset APN setting, connecting to the 2 APN that my phone has, and still won't get LTE.
Any ideas of what could be causing this behavior? Thanks!

Secuential said:
Hello. My issue is that my phone won't connect to LTE in stock ROM, but it connects with CM 12.1. But my main "concern" is that it used to connect to LTE using stock ROM... To make the long story short: when I bought the phone, it only connected to H, even if I selected LTE in Preferred Network Type (selecting LTE there even made, and still makes my data connection unstable, getting disconnected and rapidly connecting to data network, but only uses H network type) so I selected 3G, because it was made my connection stable.
Then, after some time, I decided to try and select LTE again, and it connected to LTE! Good, fast, stable connection. But after some weeks, I had to wipe my data partition, and again... it would't grab LTE. Some days ago, I flashed CM ROM, and I was surprised that it grabbed LTE with it again. And today, I decided to flash stock ROM again because CM gave me some problems with moto apps (I had to wipe data because it entered in a bootloop), and again, no LTE in stock ROM.
My question is, what can be causing this behavior? I didn't do anything to purposely fix data connection and use LTE, and my phone is capable of connecting to my carrier LTE band (i tested the speed when I was on LTE and yes, it was a lot faster than H), so it should be some ROM/software related issue. I tried to reset APN setting, connecting to the 2 APN that my phone has, and still won't get LTE.
Any ideas of what could be causing this behavior? Thanks!
Click to expand...
Click to collapse
dial *#*#4636#*#* and service menu will appear. in phone info menu select network type 'LTE only' and check your signal strength. if it's low like 1 bar in status bar that's why it keeps switching back to HSPA.

I won't connect if I select LTE only, it just shows "no service". But I have good signal here in my house, as I used to have LTE when this was working fine.

Secuential said:
I won't connect if I select LTE only, it just shows "no service". But I have good signal here in my house, as I used to have LTE when this was working fine.
Click to expand...
Click to collapse
maybe carrier signal problems? you should check LTE signal strength on other's phone and compare with yours when it's available at your house.
and you mentioned it was working with cm12.1, try with it again or maybe ur harware was defected

creative21 said:
maybe carrier signal problems? you should check LTE signal strength on other's phone and compare with yours when it's available at your house.
and you mentioned it was working with cm12.1, try with it again or maybe ur harware was defected
Click to expand...
Click to collapse
Ok, I'll try again with CM again, but it used to work some time with stock too. I think it shouldn't be a carrier or signal related problem, but I'll try using my sim card in other phone, and try again with CM, I'll report back here after I test.

It seems to be caused because of the APN. I inserted another sim card to my phone and it added a new APN, and it changed the Network Type in phone info to "LTE/GSM Auto (PRL)" and now it works! Thanks for the idea!

But I still find it strange that it connected in CM from the start, hahaha

Secuential said:
But I still find it strange that it connected in CM from the start, hahaha
Click to expand...
Click to collapse
because CM has all apns preloaded

creative21 said:
because CM has all apns preloaded
Click to expand...
Click to collapse
Nice! Hahahaha

OnePlus One fully stock - T-Mobile - no signal/carrier connection 52% of the time

My OnePlus One is on latest cyanogen 12.1, completely stock and unrooted. I am noticing high battery drain on cell stand by (42%)
and of that 52% of the time there is no connection to carrier.
Is there a fix for this issue? My wife's Note Edge (SM-N915G on stock KitKat) has no signal issues with T-Mobile. but my OnePlus One show no connection most of the time. Is this a CM12.1 issue or is this a known issue with OPO and T-Mobile combination?
Appreciate the help.

Which baseband?

This could just be because of where you're located. The OPO only supports one of T-Mobile's LTE bands, band 4, while the Galaxy Note Edge supports all three, including band 12, which has much greater range and building penetration.
All of the recent T-Mobile commercials touting improved coverage area and better building penetration are based off of using band 12 on their newer devices which support VOLTE (voice over LTE). All of their new towers incorporate this band in areas that previously had little or no coverage (especially rural and suburban).
If you're in an outlying area with poor band 4 coverage your handset will be constantly trying to lock in on the weak signal and shifting from 3G, 4G, and LTE. Doing this also greatly reduces data transmission speed and reduces battery life.
If you're in an urban area with strong signal acquisition, then forget what I just said, you have another issue.
Hope this helps.

i used OPO on tmobile and it worked fine, depends on many factors including location, time of day and of course the bands used by the device.

karthics4 said:
i used OPO on tmobile and it worked fine, depends on many factors including location, time of day and of course the bands used by the device.
Click to expand...
Click to collapse
I see from your profile that you reside in the UK. The OP doesn't list his, so I'm operating under the assumption that he's here in the states. My observations and comments in the post above yours, are strictly based on what I know about this device and with T-Mobile USA, as I'm unfamiliar with its operations in other countries.

Odysseus1962 said:
I see from your profile that you reside in the UK. The OP doesn't list his, so I'm operating under the assumption that he's here in the states. My observations and comments in the post above yours, are strictly based on what I know about this device and with T-Mobile USA, as I'm unfamiliar with its operations in other countries.
Click to expand...
Click to collapse
Apologies, should have included location detail. This OPO is in Austin, tx so its metro area.
Baseband: DI.3.0c6-00241-m8974aaaaanazm-1
Cynogen version: 12.1.1-YOG7DAS2K1
Kernel version: 3.4.67-cyanogenmod-g9220ae3
Build: LMY48Y
Will I get better luck on AT&T with OPO?

Agent5150 said:
Apologies, should have included location detail. This OPO is in Austin, tx so its metro area.
Baseband: DI.3.0c6-00241-m8974aaaaanazm-1
Cynogen version: 12.1.1-YOG7DAS2K1
Kernel version: 3.4.67-cyanogenmod-g9220ae3
Build: LMY48Y
Will I get better luck on AT&T with OPO?
Click to expand...
Click to collapse
You might, but I can't say for sure. The OPO supports 2 of the 3 bands AT&T utilizes, band 4 (like T-Mobile) and band 17. So you have more of a chance. Bear in mind, that AT&T is considerably more expensive than T-Mobile and that they have roaming agreements with each other, where if you can't get any signal for telephony you'll roam off the other's network.
Generally speaking AT&T has more coverage, because it's an older more mature company with a more established infrastructure. T-Mobile is more of an upstart, but is rapidly expanding with a newer technology. Like I said in the previous post, explaining why your wife's Note got so much better reception, newer T-Mobile devices which support all 3 LTE bands (2,4, & 12) get better reception and probably twice the coverage than what is possible with the OPO.
I hope this helps explains things.

Odysseus1962 said:
I see from your profile that you reside in the UK. The OP doesn't list his, so I'm operating under the assumption that he's here in the states. My observations and comments in the post above yours, are strictly based on what I know about this device and with T-Mobile USA, as I'm unfamiliar with its operations in other countries.
Click to expand...
Click to collapse
yes i do reside in the UK but bought my OPO in the US when i lived there back in 2013 and used it on Tmob. according to the website it works in the UK on Three and EE(tmobile/ orange). i use it on three and get 4g and 3g with no probs. i do like the tmobile usa plan of $40 unlimited all

Since stock 12.1 update, I've noticed mobile network keeps dropping and in return draining the battery quickly.
Thinking it's the update, I've installed custom 12.1 ROM, but the problem persisted.
With further searching, I've found fix here.
https://forums.oneplus.net/threads/cos-12-1-non-rooted-user-w-mobile-connectivity-issues.361244/
Goto APN settings, take note of current APN's.
Reset to defaults.
Copy previous APN values to currently selected APN.
Save then reboot phone.
If above doesn't work, try here.
https://forums.oneplus.net/threads/update-17-09-15-cos-12-1-yog4pas1no-bugs-discussion-thread.349560/
Scroll down to LTE issues and try the method described. Just note that it suggest deleting other APN, but I recommend against it because it can interfere with roaming.

byoungc said:
Since stock 12.1 update, I've noticed mobile network keeps dropping and in return draining the battery quickly.
Thinking it's the update, I've installed custom 12.1 ROM, but the problem persisted.
With further searching, I've found fix here.
https://forums.oneplus.net/threads/cos-12-1-non-rooted-user-w-mobile-connectivity-issues.361244/
Goto APN settings, take note of current APN's.
Reset to defaults.
Copy previous APN values to currently selected APN.
Save then reboot phone.
If above doesn't work, try here.
https://forums.oneplus.net/threads/...2-1-yog4pas1no-bugs-discussion-thread.349560/
Scroll down to LTE issues and try the method described. Just note that it suggest deleting other APN, but I recommend against it because it can interfere with roaming.
Click to expand...
Click to collapse
Thanks, so I am not the only one experiencing network connectivity issues. I do suspect this software related to some extent. Will try the fix and report back.

Answer!
Agent5150 said:
My OnePlus One is on latest cyanogen 12.1, completely stock and unrooted. I am noticing high battery drain on cell stand by (42%)
and of that 52% of the time there is no connection to carrier.
Is there a fix for this issue? My wife's Note Edge (SM-N915G on stock KitKat) has no signal issues with T-Mobile. but my OnePlus One show no connection most of the time. Is this a CM12.1 issue or is this a known issue with OPO and T-Mobile combination?
Appreciate the help.
Click to expand...
Click to collapse
All phones can now get WiFi calling. Just download digits and sync it. Download it on your main driver and sync it. You can use the DIGITS to call using WiFi from any device using your number.

Trikkx said:
All phones can now get WiFi calling. Just download digits and sync it. Download it on your main driver and sync it. You can use the DIGITS to call using WiFi from any device using your number.
Click to expand...
Click to collapse
Digits?

GPS not working during a phone call

Hi
I have a Oneplus 6 8G/128G, upgraded to 9.0.4 through the standard OTA channel. Since I changed my telephone operator, from Vodafone to Wind3, I'm experiencing loss of GPS signal during phone call. If I change my SIM and plug a TIM or VODAFONE one, and I still stay in the same cell area, the GPS signal is correct.
The only way to have GPS working during call, is to force the phone in 2G mode only. If I set 2G/3G or 2G/3G/4G the problem occurs.
So it seems that there is a interoperability problem between GPS and the GSM cell, but this is a bug of the phone: it I put my WIND3 SIM in a different brand phone, it works.
Is someone experiencing the same problem?
Thanks
Stefano

Yup, same problem here. I fear it's hardware. I've had the problem for all the latest beta versions of Oxygen OS

I experienced that it happens in some area and not in other area.. Here where I live it works well, while where I was last week not at all. It seems something related with LTE which tricks the firmware of the phone in some way. If they do not solve, I think I will change my phone...

My gps works ok if you are on 4g or 2g network, even in airplane mode. But if the network drops to 3g network the gps gets unstable, I realized this by taking a road trip.
I suggest you take this test

Yes, I can confirm that it works in airplane mode and in 2G 3G 4G mode when I'm in my home location. In some other places it does not work.
And so?

Same problem here, also with new 9.0.4 or the old version of os . I hope for fix. (forse conviene segnalarla sul forum ufficiale)

Problem has been solved: Oneplus sold and Galaxy Note 8 bought. So here is the end of my experience with this Oneplus which, in the end, cannot be used for professional purposes but only for playing...

Same problem with 6T McLaren
I have the same problem, during phone call gps signal is going away, if I put in airplane mode GPS is working wll, so it's not necessary tho have Mobil network or wifi. phone is updated to the latest version of Android 9 beta. Contacting the italian support team the say that it's correct to work in this way, because during phone call connection drop to h and gps nedd 3G or 4G for working, it's a crazy answer because in offline mode gps works correctly.

gmgunderground said:
I have the same problem, during phone call gps signal is going away, if I put in airplane mode GPS is working wll, so it's not necessary tho have Mobil network or wifi. phone is updated to the latest version of Android 9 beta. Contacting the italian support team the say that it's correct to work in this way, because during phone call connection drop to h and gps nedd 3G or 4G for working, it's a crazy answer because in offline mode gps works correctly.
Click to expand...
Click to collapse
I agree with you, this is a crazy and unacceptable answer. Unfortunately italian support teams are really bad in their job and with no technical skills (I have experienced the same with Samsung and Huawei service centers).
Anyway I think that there is a possible solution (at least with providers other than Wind-TRE): by enabling VoLTE in the service menu (https://forum.xda-developers.com/oneplus-6/how-to/guide-enable-volte-forcefully-activated-t3797538) some people reported that magically the GPS works correctly during phone call.
I was not able to let it work with my provider, Wind-TRE, because they have not VoLTE activated, but maybe if you have a different provider it worths a trial. I remember that when I had Vodafone as provider, the GPS always worked well and it started to fail once moved to Wind-TRE.
Let me know if it works!

After more tests I discovered that GPS signal is coming again after 4 minutes of call and continue to work, so this is a bug, no 4G or internet connection problem. Another problem is to contact OnePlus skilled support interface no one that admit that there is a problem, this is crazy!
Inviato dal mio ONEPLUS A6013 utilizzando Tapatalk

mobile data.

Hi. Im in uk and have f2 pro 5g. I have in settings set prefer network to 5g. 5g is not available where i am at all. My problem is my mobile data (working fine with lots of other phones so not signal related) sometimes just stops working.
I have set to prefer to 4g and still the same. I have updated my apn settings ( not much to change) and done factory reset. I have looked on the dial *#*#4636#*#* and i have phone info 1 and phone info 2. I go to set network type and have a list. Whenever i chose one after reboot it changes back to unknown. (Please see pics)
Any ideas???
Thanks guys.

Hello mate, phenomenally I've just received the phone yesterday. Beautiful phone. However I've come to notice the same issue. Changing over prefer lte or 5g does nothing. The only real fix is switching off data and switching it back on. Never had this issue with all my previous phones, including realme, oneplus and Huawei. It's most probably a software fault. But it's making me want to return it.
Im noticing the following, switching WiFi off when outside doesn't cause the issue but need further testing to confirm.

I read about that bug but I can not confirm it. If you turn on 5G you can only use 1 sim card but 5G is anyways almost useles on this device (only N77/N78)

3 uk is on N78

Linuxkek said:
I read about that bug but I can not confirm it. If you turn on 5G you can only use 1 sim card but 5G is anyways almost useles on this device (only N77/N78)
Click to expand...
Click to collapse
Agree, I live in Puerto Rico and it doesn't even have T-Mobiles band 66 LTE. Incredible that a phone powered by a SD 865 lack of all of these. Software updates are super bad, I haven't got 1 single update and 5G on this phone is useless.