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[Q] Save my sanity! Wifi and data disables on screen off!

OK, let me first state that I have no battery saving apps installed, power saving is off and my wifi policy is set to always keep wifi awake.
Still, whenever my screen has been off for a few seconds (I'm guessing what happens is that the phone goes into deep sleep), both my wifi and my data connection goes into some kind of sleep state as well, making connections to and from the phone impossible. This means that push messages and mail aren't delivered and oftentimes when I turn on my phone again the messages start chiming in. Note that wifi and/or data don't need to reestablish after I turn the screen back on. They're still connected, just not active.
Using FTPServer on my One S and connecting from a pc confirms that all data sending (on both wifi and data) ceases after I turn off the screen.
When the phone is plugged in, all is dandy and all connections are kept alive!
I'm currently running running ViperS ROM, but this issue has plagued me across different ROMs (both sense and aosp) and across different radios as well.
I've literally (almost) googled my ass off on this issue, but I'm at my wits end. This shouldn't be related to HTC's SmartSync, since (1) I've disabled it in VenomTweaks and (2) It supposedly doesn't kick in until after 15 minutes. All my accounts have auto-sync activated and I've also disabled stuff like "restrict background data".
I've tried with and without the sleep mode settings under power settings below activated (w/ reboot after change).
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This is driving me nuts! Nothing I do seems to have any effect - what's going on here? Heeeelp!

Fruktsallad said:
OK, let me first state that I have no battery saving apps installed, power saving is off and my wifi policy is set to always keep wifi awake.
Still, whenever my screen has been off for a few seconds (I'm guessing what happens is that the phone goes into deep sleep), both my wifi and my data connection goes into some kind of sleep state as well, making connections to and from the phone impossible. This means that push messages and mail aren't delivered and oftentimes when I turn on my phone again the messages start chiming in. Note that wifi and/or data don't need to reestablish after I turn the screen back on. They're still connected, just not active.
Using FTPServer on my One S and connecting from a pc confirms that all data sending (on both wifi and data) ceases after I turn off the screen.
When the phone is plugged in, all is dandy and all connections are kept alive!
I'm currently running running ViperS ROM, but this issue has plagued me across different ROMs (both sense and aosp) and across different radios as well.
I've literally (almost) googled my ass off on this issue, but I'm at my wits end. This shouldn't be related to HTC's SmartSync, since (1) I've disabled it in VenomTweaks and (2) It supposedly doesn't kick in until after 15 minutes. All my accounts have auto-sync activated and I've also disabled stuff like "restrict background data".
I've tried with and without the sleep mode settings under power settings below activated (w/ reboot after change).
This is driving me nuts! Nothing I do seems to have any effect - what's going on here? Heeeelp!
Click to expand...
Click to collapse
For it to work the you need to use power saver so if you don't want it doing the other things then turn them off first then turn on power saver.

Darknites said:
For it to work the you need to use power saver so if you don't want it doing the other things then turn them off first then turn on power saver.
Click to expand...
Click to collapse
Thanks for your reply!
However, I've already tried doing that. No effect whatsoever. :crying:

Fruktsallad said:
Thanks for your reply!
However, I've already tried doing that. No effect whatsoever. :crying:
Click to expand...
Click to collapse
Hmm not sure, what Hboot you on?

Darknites said:
Hmm not sure, what Hboot you on?
Click to expand...
Click to collapse
Now I'm on 2.15.0000 with radio 1.11.50.05.28.
I flashed the ICS RUU to do the official JB OTA in order to upgrade from my old hboot 1.14.0002 and radio 1.06es because I believed the old hboot and radio were the culprits in this. Sadly, they weren't.
To add insult to injury, I tried setting up a completely new google account as well as setting up a special hotmail account in the stock JB in case either of those were causing trouble with push message delays. Same crap though. Most nothing coming through until the screen was turned on.

Fruktsallad said:
Now I'm on 2.15.0000 with radio 1.11.50.05.28.
I flashed the ICS RUU to do the official JB OTA in order to upgrade from my old hboot 1.14.0002 and radio 1.06es because I believed the old hboot and radio were the culprits in this. Sadly, they weren't.
To add insult to injury, I tried setting up a completely new google account as well as setting up a special hotmail account in the stock JB in case either of those were causing trouble with push message delays. Same crap though. Most nothing coming through until the screen was turned on.
Click to expand...
Click to collapse
hmm that is odd then and got no more ideas sorry.

Darknites said:
hmm that is odd then and got no more ideas sorry.
Click to expand...
Click to collapse
You and me both, mate.
Thanks for your time.

I'm having the exact same issue on every ROM I try. Very frustrating.

ernestnwanu said:
I'm having the exact same issue on every ROM I try. Very frustrating.
Click to expand...
Click to collapse
Sorry to hear that, man!
Have you tried AOSP based ROMs as well? Made no difference for me, but YMMV...
But I agree that it's frustrating! It's 2013, everyone and their grandma are online 24/7 and I'm lucky if I get a mail notification within an hour of it actually arriving!

Fruktsallad said:
Sorry to hear that, man!
Have you tried AOSP based ROMs as well? Made no difference for me, but YMMV...
But I agree that it's frustrating! It's 2013, everyone and their grandma are online 24/7 and I'm lucky if I get a mail notification within an hour of it actually arriving!
Click to expand...
Click to collapse
Yes AOSP ROMS as well. Resetting my router seemed to fix it as far as Wifi is concerned. Can't test data at the moment.

Phone modem/radio dead?

Not sure if the phone radio is completely dead or not but I've lost all signals completely today. Nothing I do works.
If I go into Mobile Networks and choose Network Operators, the phone is able to scan for the networks and showed my correct carrier in the list. However I choose to register on it, it doesn't work. It just keeps scanning and doesn't register.
Tried flashing new ROM from scratch with new radios from CM and Oxygen (230 and 241) and neither works. Tried flashing via recovery and fastboot. Tried restoring from a working TWRP backup, still the same issue.
I took my SIM card out and tried on an older phone, works fine. Used another working SIM card on my OPO, still doesn't work. At this point, I think it could be a hardware issue with the phone. Only thing I'm confused about is why it's able to list the carriers in Network Operators and this was never an issue in the past. Also, it doesn't show a question mark in the signal bar so that would lead me to think it's detecting the network but not fully working or registered on it for whatever reason.
All I see is completely no bars in my signal bar. I can't dial or receive calls, I can't use emergency calls, but it does pickup my network as Vodafone NZ. Any ideas?
Update:
Switching to 2G, 3G and LTE doesn't do anything, still no signals. Also, looks like the Network Operators function is irrelevant to your SIM card. Unplugged my SIM and it was still able to scan for it.

I suggest you to try kitkat modem on lollipop os. I know someone has the same problem with you .I dont know why but some OPOs does not work with lollipop modems.

chaoscreater said:
Not sure if the phone radio is completely dead or not but I've lost all signals completely today. Nothing I do works.
If I go into Mobile Networks and choose Network Operators, the phone is able to scan for the networks and showed my correct carrier in the list. However I choose to register on it, it doesn't work. It just keeps scanning and doesn't register.
Tried flashing new ROM from scratch with new radios from CM and Oxygen (230 and 241) and neither works. Tried flashing via recovery and fastboot. Tried restoring from a working TWRP backup, still the same issue.
I took my SIM card out and tried on an older phone, works fine. Used another working SIM card on my OPO, still doesn't work. At this point, I think it could be a hardware issue with the phone. Only thing I'm confused about is why it's able to list the carriers in Network Operators and this was never an issue in the past. Also, it doesn't show a question mark in the signal bar so that would lead me to think it's detecting the network but not fully working or registered on it for whatever reason.
All I see is completely no bars in my signal bar. I can't dial or receive calls, I can't use emergency calls, but it does pickup my network as Vodafone NZ. Any ideas?
Update:
Switching to 2G, 3G and LTE doesn't do anything, still no signals. Also, looks like the Network Operators function is irrelevant to your SIM card. Unplugged my SIM and it was still able to scan for it.
Click to expand...
Click to collapse
Do you get to see your IMEI No.?

Yes, I do see my IMEI. Have tried all the solutions there are.......flashed oxygenOS, colorOS and imei is still there. I can see there's signal under About -> Status, but no network (unknown). My wifi works fine, just no phone signal.
My sim card is fine, tried on other phones and it works. Tried several sim cards in my OnePlus and they all fail. Wasn't like this last week, dunno what happened.
I think maybe my IMEI is blocked? I called my carrier and they said it's not. Will i need to contact OnePlus (my phone is the chinese version) to get this resolved?

Same problem. No reason. Just started happening last week...
I tried another network and it worked though.

Exactly the same problem here. It first happened when I traveled to Japan and inserted a Japanese SIM card, nothing worked, so I thought it's because of the strict radio regulations in Japan....now I'm in Ireland, popped a 3 Mobile sim card in, still not working.....God I would never buy a OnePlus product again....first the touch screen failed, now the modem......biggest mistake taking it travelling with me....

@chaoscreater @dahole @victorinoxs I have your same problem
IMEI, Baseband and WiFi are OK but no signal and status network unknown

Solutions people ! I am reading post forums , nobody haves a solution for this, is my phone Garbish?

I've got same problem after i forgot to connect antenna cable near the battery that comes from bottom board to main board. I've seen networks, but i were unable to use my phone inside any building
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https://www.androidfilehost.com/?w=search&s=Full-CM13
Try to flash this modem zip via twrp

AmazingHorse said:
I've got same problem after i forgot to connect antenna cable near the battery that comes from bottom board to main board. I've seen networks, but i were unable to use my phone inside any building
Click to expand...
Click to collapse
I am having the very same problem and, once I opened the One up I found the connector was disconnected.
But ... how to connect it back? It looks like it's a very difficult task to be accomplished!!!
SOLVED!
You can gently pull the pig tail cabletowards the center of the battery compartment, you connect it then push the cable back in.
The small narrow cable compartment that's on the side has a "soft curtain to keep the cablew in place. Be careful to put everything back in place properly.

Uqbar said:
I am having the very same problem and, once I opened the One up I found the connector was disconnected.
But ... how to connect it back? It looks like it's a very difficult task to be accomplished!!!
Click to expand...
Click to collapse
Antenna goes to bottom board near battery under rubber cover that you can unstick, connect and stick back. Just disconnect battery and pull antenna to the side of power button until you will be able to connect

AmazingHorse said:
Antenna goes to bottom board near battery under rubber cover that you can unstick, connect and stick back. Just disconnect battery and pull antenna to the side of power button until you will be able to connect
Click to expand...
Click to collapse
Yup! I "discovered" it shortly before you answered. And it worked indeed!!!

Same network issues !!
Hello everyone !!!
I'm new here and so dont know much how stuff works here. Hope to learn pretty soon
The thing is, I'm having similar problem with my OPO. I get only 4G network, no other network (2g/3g) gets connected. When on 4G, network randomly drops and connects, and when connected I can use internet, but just cannot make/recieve any calls. I have flashed many custom ROM's but to no avail. Finally after getting nowhere near solution, I stopped trying and currently I'm using Lineage OS (ver 14.1.20171001-NIGHTLY-bacon).
Drmuruga posted a link with CM13 modem zips, will flashing the CM 13 modem file work in my case ? If yes, there are two files on the link you provided, which one should I use ?

Vaibhav_F said:
Hello everyone !!!
I'm new here and so dont know much how stuff works here. Hope to learn pretty soon
The thing is, I'm having similar problem with my OPO. I get only 4G network, no other network (2g/3g) gets connected. When on 4G, network randomly drops and connects, and when connected I can use internet, but just cannot make/recieve any calls. I have flashed many custom ROM's but to no avail. Finally after getting nowhere near solution, I stopped trying and currently I'm using Lineage OS (ver 14.1.20171001-NIGHTLY-bacon).
Drmuruga posted a link with CM13 modem zips, will flashing the CM 13 modem file work in my case ? If yes, there are two files on the link you provided, which one should I use ?
Click to expand...
Click to collapse
Firmware can be a game player for sure.You can use modem from cm13(any of them,the first one is from snapshot builds).Infact, have a look at: https://forum.xda-developers.com/oneplus-one/general/firmware-modem-oneplus-one-t3462214
Which carrier are you on?

I am on Airtel (only 4g). I've tried using docomo as it is my secondary sim, but it never connects since it works on 3g network.
I've tried a couple of those from the list, but failed. Anyway, I'm gonna try the rest.
Does TWRP version matters ? I'm using 3.1.1-0.

Vaibhav_F said:
I am on Airtel (only 4g). I've tried using docomo as it is my secondary sim, but it never connects since it works on 3g network.
I've tried a couple of those from the list, but failed. Anyway, I'm gonna try the rest.
Does TWRP version matters ? I'm using 3.1.1-0.
Click to expand...
Click to collapse
It just needs to be latest.Try dialing *#*#4636#*#* in phone's dailer.Then,head over to Phone Information and you'll see preferred network modes.See attached screenshot.

Mr.Ak said:
It just needs to be latest.Try dialing *#*#4636#*#* in phone's dailer.Then,head over to Phone Information and you'll see preferred network modes.See attached screenshot.
Click to expand...
Click to collapse
Yeah I tried through that long before, but as soon as I set it on wcdma (only/preferred), there isn't any network (emergency mode only).
I've tried almost all firmwares from the link you provided using TWRP, but no luck. Maybe my card slot must have some hardware problem. Just to give it one last try, can you tell how I can Install those firmwares via ADB fastboot ?

Vaibhav_F said:
Yeah I tried through that long before, but as soon as I set it on wcdma (only/preferred), there isn't any network (emergency mode only).
I've tried almost all firmwares from the link you provided using TWRP, but no luck. Maybe my card slot must have some hardware problem. Just to give it one last try, can you tell how I can Install those firmwares via ADB fastboot ?
Click to expand...
Click to collapse
Doesn't matter.Twrp flashes the firmware just fine.
Ps- It could be network antenna.Any recent activity that could damage the phone's hardware? Jio 4G,Bsnl 3G and Airtel 3G works fine here.I'm gonna get my Airtel 4G sim tomorrow,and I'll keep you posted if it works too.

Galaxy s7 wifi issue. Connected but not online

Hello all. I have a asus rt-ac66u router set up trough my suppliers box wich is put in bridge and dhcp off so my asus handles everything. My asus us setup trough ppp0e. All other devices works fine even a s6. But my s7 connects and works for a while then dies. I can't even connect to the router. 192.168.1.1.
I've tried to remove all stored net so now I only have 2. I've tried to set ip in phone into static. No success. If I turn wifi off and on sometimes it will give me net, but it dies after some time.

I have an ac56u, no issues at all.
Using Asus official firmware, latest Merlin has some problems. Used to drop my g4 connection often, after I switched to Asus firmware everything was and it's still OK.
Sent from my SM-G930F using Tapatalk

KoRoZIV said:
I have an ac56u, no issues at all.
Using Asus official firmware, latest Merlin has some problems. Used to drop my g4 connection often, after I switched to Asus firmware everything was and it's still OK.
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
I'm using merlin, but the thing is that this phone is the only one struggling so I doubt it's the router. But off course I can always try official firmwire again.

Now I have factory reset my router and installed factory firmware. Forgotten all networks on phone. Still same issue. The strange thing is that after all this my phone gets the same ip as before everything. Ends on 53. Any ideas?

Have this issue to. Changed my first S7 for a new one because of this. Same problem with my second one. Have a Asus rt 87u or something like this. Latest update on the router and no mods.
I'm from Sweden and have read about this issue in Swedish forums as well. Hopefully there will be a bug fix from Samsung or Asus
skickat från Tapatalk

Sorry to hear this, I have no issues with mine, using automatic channel settings, wpa2 personal.
You can try to use a fixed channel
I even use the same ssid and pass for both 2.4 and 5ghz, this way when I'm out of 5ghz range it switches me on 2.4ghz band, and back to 5ghz when I enter the range.
Edit
Actually I use fixed channel, 48, not auto, I checked now.
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Sent from my SM-G930F using Tapatalk

I've done the drastic step to factory reset the phone and set it up manually. Not from what is saved on Google. Did this yesterday and it works for now. It's a pain to do but. I'll post here if it stops working. For now it works. The strange thing is that I reset my router at the same time but it still gives me a ip ending on 53 hehe.

syklitengutt said:
Hello all. I have a asus rt-ac66u router set up trough my suppliers box wich is put in bridge and dhcp off so my asus handles everything. My asus us setup trough ppp0e. All other devices works fine even a s6. But my s7 connects and works for a while then dies. I can't even connect to the router. 192.168.1.1.
I've tried to remove all stored net so now I only have 2. I've tried to set ip in phone into static. No success. If I turn wifi off and on sometimes it will give me net, but it dies after some time.
Click to expand...
Click to collapse
I have the exact problem (galaxy s7 with asus rt-ac66u router). I tried updating the firmware on my router and doing a factory data reset on my galaxy s7 (along with manual recovery). I'm still having the same problem.
I tried contacting Samsung and they recommend that I bring the phone to service technician (after, of course, recommending the factory data reset)... Maybe this is just a hardware issue after all? Seems suspiciously related to the asus router though..

So far it's working.

I'll take it back. Problem appeared again. Didn't do anything and it started working again after 5 min or so.

Actually. I turned off Bluetooth and it works again? So In my case it's a Bluetooth issue.

I have the same issue. I have call Samsung and i do a factory reset. It's work great but when i turn on just one time the bluetooth (and turn off just after), this issue come back.
I have send my phone to Samsung one time and the technicien don't see this issue. The phone come back but the problem is always present. So i re-send my phone to Samsung.
I wait a call from the technicien to explain my problem and how reproduct this issue.
I don't think that the problem is the router, because i have test on an other and i have the same issue.
And my Galaxy S3 (cyanogen), Galaxy tab pro, Lenovo A7-10 works great on the same network !
PS : Bad english = french speaker :silly:

syklitengutt said:
Actually. I turned off Bluetooth and it works again? So In my case it's a Bluetooth issue.
Click to expand...
Click to collapse
This seems like it's clearly either a Android 6 or a Galaxy S7 problem. Either way I think Samsung needs to find a solution fast. I'm in the process of returning mine on the chance it's a hardware issue. I don't really expect that to fix the problem though.

Today i changed my phone, this is my number 3. Right away after setup I got an upgrade of 70 mb. It will be interesting to see if I have the same issues with this one. Y earlier 2 had WiFi issues and battery drain when connected to WiFi.

shewless said:
This seems like it's clearly either a Android 6 or a Galaxy S7 problem. Either way I think Samsung needs to find a solution fast. I'm in the process of returning mine on the chance it's a hardware issue. I don't really expect that to fix the problem though.
Click to expand...
Click to collapse
Update:
I was combining my 2.4GHz and 5GHz bands into 1 SSID on my router when I experienced the problem. I separated the bands into their own unique SSIDs on my router and I was able to stay connected to my 2.4GHz network for 3 days and running (no issues).
I haven't gone back to see if I can connect to my 5GHz SSID yet so right now the problem is either hardware related to 5GHz or with Android 6/Galaxy S7 and combining SSID.

lezardvert said:
I have the same issue. I have call Samsung and i do a factory reset. It's work great but when i turn on just one time the bluetooth (and turn off just after), this issue come back.
I have send my phone to Samsung one time and the technicien don't see this issue. The phone come back but the problem is always present. So i re-send my phone to Samsung.
I wait a call from the technicien to explain my problem and how reproduct this issue.
I don't think that the problem is the router, because i have test on an other and i have the same issue.
And my Galaxy S3 (cyanogen), Galaxy tab pro, Lenovo A7-10 works great on the same network !
PS : Bad english = french speaker :silly:
Click to expand...
Click to collapse
Update :
I have receive my S7 but nothing change. The technicien don't call me and do nothing on the phone.
But for the bluetooth, isn't the cause. I have start my phone when i receive and i download a big game. The wifi's issue come back and i don't use the bluetooh. Wrong way ! Sorry.
I test the encryption key (WPA (TKIP) : issue , WPA(TKIP+AES) seems works better).

Samsung pushed an update yesterday. Everything has been working fine since. I'll post if anything changes. Still android 6.01 so I'm not shure what's new.

syklitengutt said:
Samsung pushed an update yesterday. Everything has been working fine since. I'll post if anything changes. Still android 6.01 so I'm not shure what's new.
Click to expand...
Click to collapse
What the version please ? I'm in APC8 and i have the issue.
Since i have change my router setting : Wifi with WPA(TKIP + AES), i don't have problem. Everything work fine.
But with WPA(TKIP) i have problem with this version(APC8)

i have problems also but i think i need to reset my router or something. i get intermittent service on wifi.

lezardvert said:
What the version please ? I'm in APC8 and i have the issue.
Since i have change my router setting : Wifi with WPA(TKIP + AES), i don't have problem. Everything work fine.
But with WPA(TKIP) i have problem with this version(APC8)
Click to expand...
Click to collapse
I have APC8 and have this problem
I changed my guest WiFi WEP settings now, just for a test to see what happens

G930W8 Rebooting several times a day

I have a G930W8 that was supposedly brand new, running stock 7.0 with TWRP and SuperSU. It reboots 1-3 times a day at random times while I'm not using the phone.
I've factory reset it and only loaded a few apps on it, cleared davlik and cache, reloaded the stock rom from odin - it is still happening. Does anyone have any tips on how to diagnose? I've tried looking through the last_kmsg files but I can't make much sense out o them - should they be able to identify the cause for the crashing? I'm trying to determine if it's a hardware issue or something else.
I did have over 40k sms / mms messages on there that I'm clearing out now, would that cause spontaneous reboots?
Thanks for any help.

slim26 said:
I have a G930W8 that was supposedly brand new, running stock 7.0 with TWRP and SuperSU. It reboots 1-3 times a day at random times while I'm not using the phone.
I've factory reset it and only loaded a few apps on it, cleared davlik and cache, reloaded the stock rom from odin - it is still happening. Does anyone have any tips on how to diagnose? I've tried looking through the last_kmsg files but I can't make much sense out o them - should they be able to identify the cause for the crashing? I'm trying to determine if it's a hardware issue or something else.
I did have over 40k sms / mms messages on there that I'm clearing out now, would that cause spontaneous reboots?
Thanks for any help.
Click to expand...
Click to collapse
40k SMS could cause problems, but you said you factory reset, that would have cleared them

*Detection* said:
40k SMS could cause problems, but you said you factory reset, that would have cleared them
Click to expand...
Click to collapse
Thanks. I reloaded them after the reset with a backup and restore app. I changed the setting to only keep 1k messages on there now and will monitor.
Hopefully that was the issue, but really wondering if I will be able to make sense of the last_kmsg logs at all.
If the smaller quantity of messages on there doesn't resolve the issue, I'll try runnning it without an sdcard for a day. I initially suspected a problem with the sdcard, formatted it since - formatting did not resolve the issue.

Am I looking in the right spot? Since clearing out my sms messages, it still crashes on me every few hours. I pulled the last two kmsg files from the last two reboots. Is there anyone that can let me know if I'm looking at the right files to diagnose?
Is this area of the file telling me anything useful?
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Any help is greatly appreciated.

UPDATE:
I left the country for 8 days and was using a Costa Rica SIM card (and various different wifi connections) - the phone did not reboot a single time in 8 days.
On my first day back home, after putting my AT&T SIM card back in (this is a new card that I just got a few weeks ago from AT&T), and being connected to my home wifi - it has started spontaneously rebooting again. I've reset the network connections, it has not helped.
I'm torn between whether I got a bad SIM card that could be causing the reboots, or if it is something wrong with the wifi and my home network, or a combination of both. Many of the reboots seem to occur when I switch from LTE to wifi. It is a very difficult issue to reproduce.
Any suggestions on how to isolate the issue, any settings to check, or if it sounds like a radio or hardware issue?
Thanks.

slim26 said:
UPDATE:
I left the country for 8 days and was using a Costa Rica SIM card (and various different wifi connections) - the phone did not reboot a single time in 8 days.
On my first day back home, after putting my AT&T SIM card back in (this is a new card that I just got a few weeks ago from AT&T), and being connected to my home wifi - it has started spontaneously rebooting again. I've reset the network connections, it has not helped.
I'm torn between whether I got a bad SIM card that could be causing the reboots, or if it is something wrong with the wifi and my home network, or a combination of both. Many of the reboots seem to occur when I switch from LTE to wifi. It is a very difficult issue to reproduce.
Any suggestions on how to isolate the issue, any settings to check, or if it sounds like a radio or hardware issue?
Thanks.
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Yea, disable WiFi for another week, if it stops, it's the wifi, if it still crashes it's the SIM

Thanks. It just crashed again with wifi turned off, so that rules out that.
So it seems likely either a bad SIM, or the phone is having issues with the LTE network. I notice the network switches from LTE to LTE+ often.
It would be odd if it is a bad SIM as it is only a few weeks old, but I'll swap it out with AT&T.
Knowing that wifi is not an issue, any other suggestions other than a bad SIM? I'm also wondering if maybe the sim tray does not hold the hard well and it's loose.
Thanks for the support.

slim26 said:
Thanks. It just crashed again with wifi turned off, so that rules out that.
So it seems likely either a bad SIM, or the phone is having issues with the LTE network. I notice the network switches from LTE to LTE+ often.
It would be odd if it is a bad SIM as it is only a few weeks old, but I'll swap it out with AT&T.
Knowing that wifi is not an issue, any other suggestions other than a bad SIM? I'm also wondering if maybe the sim tray does not hold the hard well and it's loose.
Thanks for the support.
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Click to collapse
Just keep with your elimination technique, looks like you're almost down to the cause, be it SIM or LTE/+
Switch SIMs, if it doesn't crash when switching between LTE and + then ask your carrier for a new SIM

Couldn't a log file of some sort be run to trap/identify the app and error?

ok i had this problem when buy my s7 10 months ago with stock firmware. all ways reset/on/off/clear cach/format....noting useful so i tried to update but no new update so i force to download whole new firmware with another csc from another region( i downloaded rom of UK) and flashed to phone with Odin. and Wow problem is gone....finish...end .
maybe useful for u.

Question Signal problem only resolving after a restart

im facing a problem, i use 2 sim cards so whenever im in an area of bad coverage i completely lose the signal, the problem is when i went to a good coverage area, the signal is staying dead till i restart my phone. Airplane mode does nothing only restarting or if im just using one sim card (which is not an option unfortunately)

did you try to check the " Automatically select network " under mobile networks in the settings app ?
try to turn it on , or try to select your network manually

m.yasser4505 said:
im facing a problem, i use 2 sim cards so whenever im in an area of bad coverage i completely lose the signal, the problem is when i went to a good coverage area, the signal is staying dead till i restart my phone. Airplane mode does nothing only restarting or if im just using one sim card (which is not an option unfortunately)
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Click to collapse
did you check if the problems happens when only ONE sim is installed?
are BOTH simcards of new generation? (I don't mean to support 5G but to be manufactured the same period).
It's useless to use simcard that is more than 5 years old. They cannot communicate with all new signal standards.

ag6ag said:
did you try to check the " Automatically select network " under mobile networks in the settings app ?
try to turn it on , or try to select your network manually
Click to expand...
Click to collapse
It's already on by default, disabled it then tried to choose manually it keeps saying something like can't connect

gorillaz_gr said:
did you check if the problems happens when only ONE sim is installed?
are BOTH simcards of new generation? (I don't mean to support 5G but to be manufactured the same period).
It's useless to use simcard that is more than 5 years old. They cannot communicate with all new signal standards.
Click to expand...
Click to collapse
it works fine if i just have one sim card
yes they are ( one is like 2 years old and the other is ~3 years )

Does it make a difference if you use Sim card A or B when using only one sim card or do both of them run like a charm in single mode? Did you try to combinate sim a or b with a totally different simcard (from a fiend for example, or change the ports for A/B) ... did it ever function in the now used/wanted combination? Sorry for my bad english...

borisku said:
Does it make a difference if you use Sim card A or B when using only one sim card or do both of them run like a charm in single mode? Did you try to combinate sim a or b with a totally different simcard (from a fiend for example, or change the ports for A/B) ... did it ever function in the now used/wanted combination? Sorry for my bad english
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Click to collapse
your english is better than mine ... ill try swapping the ports and inform you back .. tysm brother

m.yasser4505 said:
your english is better than mine ... ill try swapping the ports and inform you back .. tysm brother
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Click to collapse
What is your OS system? MIUI or custom ROMs?
Does the signal comes back if you change "Preferred network type" ? Like switching to 2G only, wait for 30 seconds, then prefer 3G, wait for 30 seconds, then prefer LTE/4G ?
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If you are in MIUI, you can also try forcing 2G only, 3G only LTE only as in following Xiaomi forum
https://c.mi.com/thread-2683781-1-0.html
This does not solve the problem, only some workaround to try to make your signal back without rebooting.
To solve the problem, report to Xiaomi or Poco. Or ask in the custom ROM thread if you are using custom ROMs.

try to check your network maybe they having their maintenance or you can use another sim if you have to check if it's still the same.

pl1992aw said:
What is your OS system? MIUI or custom ROMs?
Does the signal comes back if you change "Preferred network type" ? Like switching to 2G only, wait for 30 seconds, then prefer 3G, wait for 30 seconds, then prefer LTE/4G ?
If you are in MIUI, you can also try forcing 2G only, 3G only LTE only as in following Xiaomi forum
https://c.mi.com/thread-2683781-1-0.html
This does not solve the problem, only some workaround to try to make your signal back without rebooting.
To solve the problem, report to Xiaomi or Poco. Or ask in the custom ROM thread if you are using custom ROMs.
Click to expand...
Click to collapse
first of all thx for ur time trying to help out much appreciated . I just switched to Pixel Plus 12L like 3 days ago (was on ArrowOS 11 while i was facing this problem), however im not facing any signal issues so far with current rom so gonna wait and see

icodix said:
try to check your network maybe they having their maintenance or you can use another sim if you have to check if it's still the same.
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Click to collapse
we usually get informed whenever there's a maintenance or something, for the sim card i will wait and check if it needs to be changed since i switched to another rom n not having any issues so far, thx for the help brother

m.yasser4505 said:
we usually get informed whenever there's a maintenance or something, for the sim card i will wait and check if it needs to be changed since i switched to another rom n not having any issues so far, thx for the help brother
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Click to collapse
no prob