Develop Bugs

No data after leaving WiFi

My stock T-Mobile G3 continues to give me weird issues. After I leave WiFi, I only able to make calls, but don't have any data, unless I reboot. It does not happen all the time, but often when I on WiFi for a while. I tried disabling WiFi Calling and it seemed to help. This morning the data was working as soon as I left home range. I tried reflashing the stock ROM and modem, but it didn't work.

Yeah, I have the same issues on stock...
Basically, I've stopped using Wifi Calling altogether. If I was on Wifi with it on and then left the Wifi area, I couldn't do anything, no calls, no texting, no data. Reboot would bring it back, but that was a pain.
Everything seemed okay with Wifi Calling off, but then I noticed that it would randomly not give me data when I left Wifi. As you said, reboot fixes it. It doesn't happen nearly as often as when I leave Wifi Calling on, so it's not too annoying to have to deal with it right now.
One question I have for you, did you do a full phone wipe after you upgraded to the latest OTA update? I've heard doing so helps with some of the strange quirks like this, but haven't taken the time to do so myself.

The whole point of me switching over to G3 from Nexus 5 was to get the WiFi calling feature. This blows completely. I'm still going to hold on to in, hoping they release new update in September.
As far as wiping, I've flashed the device so many times by now, I'm pretty sure I've done a full wipe at some point.

xxhaimbondxx said:
The whole point of me switching over to G3 from Nexus 5 was to get the WiFi calling feature. This blows completely. I'm still going to hold on to in, hoping they release new update in September.
As far as wiping, I've flashed the device so many times by now, I'm pretty sure I've done a full wipe at some point.
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Ah, that sucks. I was hoping that wiping might solve my issue.
Well then, maybe contact T-mobile? If it's not a wide-spread issue (I've asked around here and haven't heard others with this exact problem until your post) then maybe there's a solution.

WiFi not working properly v20b

I have installed v20b, everything works fine except WiFi: after sometime the connection just doesnt work and i have to turn off and on again the WiFi. This just happened to me at least 10 times

ImSpiderman said:
I have installed v20b, everything works fine except WiFi: after sometime the connection just doesnt work and i have to turn off and on again the WiFi. This just happened to me at least 10 times
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try to reset your phone it should help and backup before i am also on v20b and no problems with wifi on my phone till now (upgraded and factory reseted)

I did it before flashing the rom because i was on cm13, dont think that another reset can help :/

ImSpiderman said:
I have installed v20b, everything works fine except WiFi: after sometime the connection just doesnt work and i have to turn off and on again the WiFi. This just happened to me at least 10 times
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I do have this on IEEE 802.1X networks only. Also on Android 5.1. This seems to be regardless of root/no root.

Jens1969 said:
I do have this on IEEE 802.1X networks only. Also on Android 5.1. This seems to be regardless of root/no root.
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Had WiFi dropouts on every LG ROM on this device.
It would drop on any WiFi network I tried. My old phone and all other devices have no issues at all.
Bit the bullet and unlocked bootloader and went to CM13, rock solid WiFi now. IMO LG's software is borked.

Adam86 said:
Had WiFi dropouts on every LG ROM on this device.
It would drop on any WiFi network I tried. My old phone and all other devices have no issues at all.
Bit the bullet and unlocked bootloader and went to CM13, rock solid WiFi now. IMO LG's software is borked.
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Whats the easiest way to unlock BL? do you have to download the file from android thats 1 plus gig big and do it thru that ?

awes0me1 said:
Whats the easiest way to unlock BL? do you have to download the file from android thats 1 plus gig big and do it thru that ?
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Right now there is only one way: LG Developer program.

I think that is problem with 6.0
My network is ipv4 and i think phone force ipv6. In developer options have option to use lollipop settings but i think that is not doing any better

There was an issue with Verizon 12B that was recalled with similar issues.
Never had Wi-Fi issues otherwise. It was patched in 13B

ImSpiderman said:
I have installed v20b, everything works fine except WiFi: after sometime the connection just doesnt work and i have to turn off and on again the WiFi. This just happened to me at least 10 times
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Click to collapse
Same with me on 20a... wifi connects but there's no internet connectivity. Then it comes good for a while but eventually drops the wifi connection completely. Sometimes it forgets the wifi password and I have to re-enter it. Makes the phone essentially useless on wifi. A factory reset seems to be the next step unless anyone has any other suggestions?

Same problem on 20b

The WiFi problem seems to have settled down for me now. I went on a binge of uninstalling and reinstalling apps, cleared all app caches, rebooted several times, and recited some incantations (mostly beginning with f). I haven't spent a lot of time using it on WiFi but it seems a lot more stable. Will keep an eye on it and see how it goes.

I came back to a stock based ROM from CM13 because the lack of camera functionality and all my WiFi dropouts are back again. This is really disappointing with this phone as it is completely random and none of my other phones/devices have ever had problems like this. End of my tether with it to be honest, this phone will be going on eBay at this rate.

Well I've been running catlog tonight and it didn't take long for the WiFi to blip.
If there are any catlog experts out there I would really appreciate it if anyone could have a look to see if there is any indication of what is causing this random disconnection and then reconnect shortly afterwards
Many thanks in advance.

Sorry, can't help with the catlog. But having same problems.
I did 3 hard-resets with always the same result: wifi works fine for 1-2 days, than breaks.
The connection is strong an seems stable but data-throughput and ping times are ugly (0,4 Mb down, ping around 2-3 seconds).
Here's a screenshot that perfectly shows the impact: same phone, same setup, same wifi. just 1 day between the tests.
i.imgur[dot]com/JYI7b9I.jpg (sorry, can not upload pics)
Any ideas how to fix this? a DNS problem?
btw: IPv6 is disabled on the router.

I have the same problem and i found a solution for me. I'm using pebble smartwatch with G4 and i noticed that when i disconnect my watch or turn off bluetooth, wifi stays stable. If you have a bluetooth device like me you can try this method.

PixPi said:
I have the same problem and i found a solution for me. I'm using pebble smartwatch with G4 and i noticed that when i disconnect my watch or turn off bluetooth, wifi stays stable. If you have a bluetooth device like me you can try this method.
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Click to collapse
I've also had my G4 get into a state where Bluetooth is stopping WiFi from working. I posted a thread about this here. To summarise, I've twice gotten into the state where my WiFi disconnects whenever I put the phone to sleep. When it wakes up, it takes ages to reconnect. Sometimes it fails to authenticate and forgets the password for the WiFi network. Even when it is connected, the connection is very flaky. This only happens when I'm on a 2.4Ghz network and Bluetooth is enabled - if I disable Bluetooth or switch to my 5Ghz network then WiFi is ok.
I've had this happen to me twice now... the first time was straight after the update to MM. I fixed it by uninstalling and reinstalling apps, and eventually it came good. After a few weeks the phone got into that state again. I tried clearing cache, factory reset, and reinstalling MM using the LG Bridge "Update error recovery" option and nothing helped. Once again I went through my apps one by one and uninstalled and reinstalled them and once again the phone came good.
This is a huge pain in the butt... not sure how long the phone will hold out before it gets into this state again. I really hope there's a MM update that addresses this soon.

sladflob said:
I've also had my G4 get into a state where Bluetooth is stopping WiFi from working. I posted a thread about this here. To summarise, I've twice gotten into the state where my WiFi disconnects whenever I put the phone to sleep. When it wakes up, it takes ages to reconnect. Sometimes it fails to authenticate and forgets the password for the WiFi network. Even when it is connected, the connection is very flaky. This only happens when I'm on a 2.4Ghz network and Bluetooth is enabled - if I disable Bluetooth or switch to my 5Ghz network then WiFi is ok.
I've had this happen to me twice now... the first time was straight after the update to MM. I fixed it by uninstalling and reinstalling apps, and eventually it came good. After a few weeks the phone got into that state again. I tried clearing cache, factory reset, and reinstalling MM using the LG Bridge "Update error recovery" option and nothing helped. Once again I went through my apps one by one and uninstalled and reinstalled them and once again the phone came good.
This is a huge pain in the butt... not sure how long the phone will hold out before it gets into this state again. I really hope there's a MM update that addresses this soon.
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I've noticed my Bluetooth problem in two ways. One of them was connecting a Bluetooth speaker while the watch is connected. When i connected speaker too, wifi had no issues.
And the other situation that i made my wifi stable was going into safe mode. Even Bluetooth on i was able to connect and stay connected to wifi when i was in safe mode.
Which apps did you have to reinstall? Do you remember?
Sent from my LG-H815 using Tapatalk

ImSpiderman said:
I have installed v20b, everything works fine except WiFi: after sometime the connection just doesnt work and i have to turn off and on again the WiFi. This just happened to me at least 10 times
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Click to collapse
This not 6.0 issue This horror exist on 5.1. same...
I try som stuff but not working the issue still alive....

PixPi said:
And the other situation that i made my wifi stable was going into safe mode. Even Bluetooth on i was able to connect and stay connected to wifi when i was in safe mode.
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Yes, I noticed this too... everything worked fine in safe mode.
Which apps did you have to reinstall? Do you remember?
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Click to collapse
I just started going down my app list and uninstalling apps which looked like they might have something to do with bluetooth, then putting the phone to sleep and waking it up to see if the problem was still there. I got a bit slack and maybe uninstalled two or three at a time before testing. I should have been more systematic about it but I wasn't really expecting it to work. I'm pretty sure the last one I uninstalled before things started working was TuneIn Radio so if you have that installed you might want to try uninstalling it. I've since reinstalled it and WiFi is still working.

Wifi issues

The wifi works fine for a while and then just dies. The wifi icon is still in the statusbar but no matter what app I open that uses the internet connection, nothing will ever load and Whatsapp messages will not be sent. When I disable wifi and re-enable it, there's a ! next to the wifi signal bar stating there's no internet connection and of course, none of my internet dependant apps work still. I have to reboot my phone (shut it down and turn it back on; apparently they never thought of adding a restart option) to get my wifi to work properly again. This happened a few days ago as well and I really hope I don't have to reboot my phone every couple of days to get my wifi working. So any suggestions? (No suggestions that include flashing a custom ROM on it or rooting it!!) A factory reset won't help because I bought the phone with Android 6.0.1 already pre-installed. I have the security patch of july 2016 installed.
P.S. My 4g internet works fine.

How about giving rebooting the router a try.
Sent from my Nexus 5X using Tapatalk

I have a similar error.
That my Nexus partially can not access the Internet via wireless, to which it constantly changes between the wireless and mobile data.
Does this have to do with the "intelligent network change" setting, if so how can you turn off the setting, in marshmallow is this setting not available.
The trouble also occurs with other routers.
Nexus 5x Android 6.0.1 (MTC19T) Stock with Systemless Root
greetings from Germany
translated with Google

EeZeEpEe said:
How about giving rebooting the router a try.
Sent from my Nexus 5X using Tapatalk
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I did that the first time it happened since my router tends to freeze once in a while, even with the weekly schueduled reboot. But the thing is, my iPad still had internet while my Nexus didn't so it was definitely on the phone's end. I did a quick Google search and a plethora of other cases popped up so I knew I wasn't the only one. Apparently those wifi issues have been around ever since the update to 6.0.1 and the fact that Google did absolutely NOTHING to fix it those 9 months is just ridiculous!

Hi!
You've got the option to try the Android 7 (Nougat) Developer (now released: Preview 5) version.
Works fine and stable for me, and there is a slight chance that it will help with your problem.
Just join the: android.com/beta
And you can always roll back to your current Android version.

wifi keeps disconnecting on nougat

Anyone facing this issue
Does anyone know any fix

Yes mines the same, wifi works fine for a short amount of time then disconnects, after it cuts out goto wifi settings and all I see is scanning and no wifi devices. only way I can get wifi working again is a reboot but then I get disconnecting again after short period of time!
EDIT: I would just like to add until I updated to nougat yesterday I've never experienced this issue and I did a master reset straight after installing nougat.

I am having this same problem. Any fix for this?

Same thing here. It happened to me after the first night. I thought maybe something was corrupted after the upgrade, so I did a full factory reset yesterday morning. Everything worked fine until I got up this morning. Looks like something over the course of the night causes this to start.
Things I've tried without success:
- factory reset
- rebooting
- removing and re-adding wifi network
- tested all other devices in the house (no other device is having an issue)
- tried both 2.4 and 5ghz networks (issue is affecting both)
UPDATE: After a few hours, I turned wifi back on yesterday, and it's been working fine since. I made no changes to the phone.

Faced same problem with developer preview
Before the official release of Android 7.0 I installed two Android beta preview, 3 and 5, and had the same issue I uninstalled the previews and had no problems with version 6.1. I hoped that this would be fixed with the official version but It wasn't, Im still facing the same problems with wifi disconnecting.
Edit: When I had the previews the only way that the phone would seem to remain connected was to go into the router options and change the client lease time. I never fully tested this because I uninstalled the previews within a couple of days. I guess I'm going to have to test it this time.

http://forum.xda-developers.com/google-nexus-5/general/guide-to-fix-persist-partition-t2821576
Maybe this thread could help you guys, didn't try, and as it is for nexus 5, do every operation carefully.

Flashed back to 6 as the WiFi issue was unbearable, working perfectly fine again now. I was also getting major battery drain on 7.0.

Hi
I found a strange solution working for me. I had bluetooth disabled, since I have enabled bluetooth today, 5 GHz connection is stable - Pls test it and update. And pls don't ask me, why these two protocols are in any way related...

IT_Andy said:
Hi
I found a strange solution working for me. I had bluetooth disabled, since I have enabled bluetooth today, 5 GHz connection is stable - Pls test it and update. And pls don't ask me, why these two protocols are in any way related...
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Didn't work for me.
This problem had disappeared for weeks and then started rearing its head again yesterday although I had made no changes to my phone. For the record, it's happening on both frequencies for me.
Last time, the issue magically disappeared. After it didn't go away over night, I restarted my router this morning, and now it's working fine.
To clarify, I don't think it's router related, though. I have an R7000 that's working perfectly with all other phones and other devices in the house. It's the same router the 5x was connected to before Nougat started causing these issues.

Apparantly 7.1 solves the issue
Sent from my Pixel XL using XDA-Developers mobile app

TMobile Losing Signal

I recently got a P3XL from B&H. It was Android 9 out of the box. The first thing I did was unlock the bootloader. Then I fully upgrade to Android 11 with May and rooted with the latest Magisk (v23). I want to use it as a secondary WAN for my home internet using USB tethering. I installed a battery charge app to keep it at 80% and set to auto USB tether in developer tools. Everything seems fine, but it loses signal every hour. Only a reboot is able to get signal back. I tried toggling airplane mode, mobile data, disabling all battery saver options, clearing network, clearing cache, and changing SIM. The data seems to last longer when I uninstalled Magisk, but It still goes out. My Nexus 5 has been going strong with this setup for years. I also tried using Automate to reboot when it loses signal, but sometimes the phone justs shuts down after the reboot command. Next Ill try: factory reset, flash image (if uninstalling Magisk left stuff), change line SIM, check mobile data when not usb tethered, convert to eSIM, or make a keep alive script. Any other suggestions is appreciated. I hope I dont have to exchange/return it. Thanks.

I recently picked one of these up and I'm having trouble with dropped signal as well. I have to airplane mode to get any signal at all when it happens. I'm thinking about flashing the factory image with the radio to see if that helps, did you find another solution?

sillycat98 said:
I recently picked one of these up and I'm having trouble with dropped signal as well. I have to airplane mode to get any signal at all when it happens. I'm thinking about flashing the factory image with the radio to see if that helps, did you find another solution?
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I have tried anything yet, but Ill keep this thread updated.

I tried it last night, it didn't help. I'm returning mine.

sillycat98 said:
I tried it last night, it didn't help. I'm returning mine.
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Where did you puchase yours?

Swappa, I'm looking at a OnePlus 6T instead.

I finally got it working. I think my issue is the long use of USB tethering. On the latest Android 11 and 10 images, it would lose signal after an hour or so. Signal is restored when I disconnect it from USB. It works as expected with the latest Android 9 image. Mobile signal was still connected overnight with USB tethering enabled. It sucks that it will be two versions of Android behind. Im not sure if it was a security month patch or the baseline that nerfed USB tethering, but I dont plan to try each Android 10/11 image. I sent feedback to Google and hopefully it will be fixed by the final update for this phone. Ill try it again when the final image is released.