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Network goes out randomly

Hey guys I was gifted a (used) M8. It came with the lastest official CM12.1, everything unlocked. I have found that network will stop working randomly and switching airplane mode on and off will do the trick. Thing is, I have missed important calls because of this. I've already researched the subject and no one seems to have a solution. This post is my last attempt at fixing this issue. Only details I can give you is I am using a Verizon phone on MetroPCS, and I suppose that has something to do with it. Also, is there any (preferably free) way to get my phone to automatically switch airplane mode on and off every 15 minutes or so when the screen is off?Thanks in advance!

mhrf.90 said:
Hey guys I was gifted a (used) M8. It came with the lastest official CM12.1, everything unlocked. I have found that network will stop working randomly and switching airplane mode on and off will do the trick. Thing is, I have missed important calls because of this. I've already researched the subject and no one seems to have a solution. This post is my last attempt at fixing this issue. Only details I can give you is I am using a Verizon phone on MetroPCS, and I suppose that has something to do with it. Also, is there any (preferably free) way to get my phone to automatically switch airplane mode on and off every 15 minutes or so when the screen is off?Thanks in advance!
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Have you tried using a stock ROM or changing radios? Is your firmware up to date?
Can't speak from experience from using a cm12 ROM, but generally stock usually works better with signal over AOSP, especially if you're in a poor signal area.

I used to have similar problems, turned out WCDMA and LTE bands that my carrier used were disabled.
For my case (T-Mobile), I simply activated WCDMA 2 & 4 and LTE 2 & 4 and now have signal almost 24/7.
You can do this with CDMA tool since your phone is Verizon branded.
As for automatically cycling Airplane Mode, I'd imagine Tasker can do that.

dbs25 said:
I used to have similar problems, turned out WCDMA and LTE bands that my carrier used were disabled.
For my case (T-Mobile), I simply activated WCDMA 2 & 4 and LTE 2 & 4 and now have signal almost 24/7.
You can do this with CDMA tool since your phone is Verizon branded.
As for automatically cycling Airplane Mode, I'd imagine Tasker can do that.
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Click to collapse
How about page plus which is verizon network. My text and calls work but no data and APN doesnt make a difference ROM wolla gpe 6.1 MM

Phillyfinest89 said:
How about page plus which is verizon network. My text and calls work but no data and APN doesnt make a difference ROM wolla gpe 6.1 MM
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Three threads and you still ask here too? Please stick to one thread bud. As soon as I see three threads by the same user with the same issue I automatically skip them.
Sent from my HTC6545LVW using Tapatalk

Sorry

MI MiX 2S LTE & 4G Bands and connection problem Solved

I finally solved the problem i encountred with my mi mix 2s regarding LTE & 4G Bands and connection .
I just flashed a modem.img file extracted from the lasted rom posted on xiaomi.eu
https://xiaomi.eu/community/threads/9-3-28.49842/
i just used this command on fastboot
fastboot flash modem modem.img
After rebooting i got the LTE signal working correctly.
Just give it a try if you have the same problem
Thanks

Which baseband version do you have after that? Which network provider do you use? Thanks!

I have a Mi Mix 2S, M1803D5XA, 8/256GB model, bootloader unlocked, running Global Beta ROM 9.3.28 with baseband version AT4.0c2.6-303-0325_2303_ea9c837. The network operator is Telefonica/O2, the service provider is 1&1. LTE coverage mostly B20/800Mhz, rural area.
After losing 4/LTE connection, my phone does not reconnect automatically with the available 4G/LTE network (B20, 800 MHz). I have to change the default preferred network settings (LTE/TD-SCDMA/UMTS) to "LTE only" or "LTE/CDMA/UMTS (auto) PRL" and only then the phone reconnects to the available 4G/LTE network immediately. Rebooting/restarting the phone also helps to reconnect. So I think I have to restart the modem to trigger a reconnect. If I just put the phone on the windowsill and wait for it to reconnect the modem sometimes seems to "freeze". The phone indicates a 4G/LTE connection (four out of five reception bars), however, there is no internet connection. Again, rebooting/restarting the phone helps.
Also, if the phone has to switch from 4G/LTE to 3G or 2G it does not aggressively try to reconnect with "better" networks. "Upgrading" the connection to a 4G/LTE network takes quite some time.
I wonder why the default preferred network is "LTE/TD-SCDMA/UMTS" anyway because there is no TD-SCDMA network in Europe. I think it should be "LTE/CDMA/UMTS (auto) PRL", again, I don't know whether this is part of the problem or just irrelevant.
I noticed this issue mid-January-ish, I do not know whether it can be linked to the Mi Mix 2S' SAR value issue that was discovered by some French authorities ...
Thanks,
Lars

Being totally frustrated led me to reverting my Mi MIX 2S (M1803D5XA, 8/256GB model) back to the Chinese Beta ROM 9.4.12 yesterday evening, completely wiping the phone and locking the bootloader in the process.
Today, I've tested the "reconnectivity" a few times and surprisingly (?) the phone now works as expected, or at least much better. After completely losing the 4G/LTE connection inside a building (this was also expected) the phone immediately reconnected to the available 2G network and then to the available 4G network upon leaving the building with almost zero lag.
Chinese Beta 9.4.12 comes with baseband version AT4.0.c2.6-303-0409_2210_8fadd5d.

and here is the final solution
Download link in this post
https://xiaomi.eu/community/threads/call-dropping-or-caller-does-not-hear-me-anymore.49296/page-2
Thanks to All

bibo3002 said:
and here is the final solution
Download link in this post
https://xiaomi.eu/community/threads/call-dropping-or-caller-does-not-hear-me-anymore.49296/page-2
Thanks to All
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sadly this is still not the solution...

futureshock said:
sadly this is still not the solution...
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Click to collapse
Same on my side - yet another updates and still no luck!
The only solution for now is to downgrade ROM to anything from 2018 because problem started in early 2019 ROMs

still not solved...
even some reported that the issue should not be there when using an custom aosp rom... but i had an calldrop/caller didn't hear me anymore today on my test drive with resurrection remix rom! as soon as i use another phone, tested huawei p30pro, galaxy s10+ or even the simple nokia 81104g i havent had an single issue with call dropping on the same route!
it also make me belive that after flashing ah new rom (after ah wipe) it looks like that it is working.. but after a day or a few days the problems start to appear?!

I believe I'm still having this issue whereas in certain areas I'm losing coverage and my phone won't regain services for a very long time. It's predominantly happening at home which is very frustrating. Has anyone found success in resolving this issue? I'm on Verizon and looking for any help possible.

S10e 9700 LTE connection issue

Hi,
I recently recieved my G9700 and until now I'm quite happy - apart of some connection issues.
At home I get 2 or 3 bars 4G after log in. Then after some time this changes to H/H+ or even down to E, but never changes up again.
So every loss of connection speed is permanent until next log in.
Am I the only one having this?
Are there possible solutions?
Thanks,
Derk

_Derk_ said:
Hi,
I recently recieved my G9700 and until now I'm quite happy - apart of some connection issues.
At home I get 2 or 3 bars 4G after log in. Then after some time this changes to H/H+ or even down to E, but never changes up again.
So every loss of connection speed is permanent until next log in.
Am I the only one having this?
Are there possible solutions?
Thanks,
Derk
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Click to collapse
It could be either a hardware fault or network issue. You need to run some diagnostics. Change sim card to another network carrier and see if issues persist. Also the first thing to check is your APN settings before anything else.
Sent from my SM-G975U using Tapatalk

am on oxygen os beta 15 and notice a rather strange phenomena.

When I am on WiFi both 2.4 or 5 G, my data line gets cut off automatically.!!!
Is this normal? Or have I unknowingly set up my phone as such?
Am using oneplus 7pro.

dswwong said:
When I am on WiFi both 2.4 or 5 G, my data line gets cut off automatically.!!!
Is this normal? Or have I unknowingly set up my phone as such?
Am using oneplus 7pro.
Click to expand...
Click to collapse
The normal version OnePlus 7 Pro
does not have 5G
Only the OnePlus 7 Pro 5G version
has 5G
P.S.
Which OnePlus 7 Pro phone version do you have?

laikexpert said:
The normal version OnePlus 7 Pro
does not have 5G
Only the OnePlus 7 Pro 5G version
has 5G
P.S.
Which OnePlus 7 Pro phone version do you have?
Click to expand...
Click to collapse
My op7P is the non 5G phone.
By 5G I referred to the dual band WiFi.

That's normal. Why would you want data to be enabled while using WiFi? Except when you want faster network switch but more battery drain. You can force enable it in developer options to keep data on while connected to wifi. It's called "mobile data always active"

KennethHau said:
That's normal. Why would you want data to be enabled while using WiFi? Except when you want faster network switch but more battery drain. You can force enable it in developer options to keep data on while connected to wifi. It's called "mobile data always active"
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Thks for advice bro

This post is about 5Ghz WIFi network ... not 5G phone......for all the super-tech questions.....some people....speechless, and "senior member" also

dswwong said:
When I am on WiFi both 2.4 or 5 G, my data line gets cut off automatically.!!!
Is this normal? Or have I unknowingly set up my phone as such?
Am using oneplus 7pro.
Click to expand...
Click to collapse
You can go in to Developer Options & select "Mobile Data Always Active'.

alexvasile said:
This post is about 5Ghz WIFi network ... not 5G phone......for all the super-tech questions.....some people....speechless, and "senior member" also
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Click to collapse
No harm done.... No worries

Data mobile issues after upgrade to Android 12

Hi everyone!
Two days ago I upgraded my OP 7 Pro to Android 12 (GM1913_11_H.30) but I noticed a weaker coverage of my mobile network data and, the worst thing, when I make a call the mobile data has always deactivated.
Before the upgrade it happened only often but now I always have mobile data disconnected.
However, I don't remember such weak coverage before the upgrade and the phone is in Edge mode most of the time..
Do you have the same issues?
Do you know how we can fix them?

Hello !
I got the same issue..
Version : OxygenOS 12.1|Android12|GM1913_11_H.30
since I updated my 7 pro , I m losing my network coverage too often..
With android 11 I had any issue about network but since I updated to android 12 my network going away. I use everyday hotspot mode to share network with my computer for work and I get constantly disconnected.
I saw few post complaining about it but any informations came from OnePlus , sadly
I found a way to get back my network without rebooting my device or waiting 10 mins.
I disable my Sim card then I enable it..
now I m looking a way to roll back to android 11 or if isn't possible, I m thinking deeply about a factory reset.
OnePlus 7 pro Europe
French operator : Sosh (orange)
I already reset my wifi settings but nothing changed
If anyone got information about it, I m all ears !
Cheers!

SynAct said:
Hello !
I got the same issue..
Version : OxygenOS 12.1|Android12|GM1913_11_H.30
since I updated my 7 pro , I m losing my network coverage too often..
With android 11 I had any issue about network but since I updated to android 12 my network going away. I use everyday hotspot mode to share network with my computer for work and I get constantly disconnected.
I saw few post complaining about it but any informations came from OnePlus , sadly
I found a way to get back my network without rebooting my device or waiting 10 mins.
I disable my Sim card then I enable it..
now I m looking a way to roll back to android 11 or if isn't possible, I m thinking deeply about a factory reset.
OnePlus 7 pro Europe
French operator : Sosh (orange)
I already reset my wifi settings but nothing changed
If anyone got information about it, I m all ears !
Cheers!
Click to expand...
Click to collapse
I don't think you'll fix your issue through a factory reset, because it seems to be a well known issue in Android 12 with this phone.
Android 11 has as drawback the battery draining, in fact, I was pondering to roll back to Android 10 (10.0.1) bit, however, I discovered that my carrier doesn't support the VoLTE feature on this phone. Thus, I decided to migrate to a new phone...