Develop Bugs

H812 Keeps Losing Signal (Please Help)

Hello everyone, I've been lurking here all weekend as I've been trying to stabalize this phone I bought off of Kijiji. Right off the bat, when I
installed the sim I forgot to turn off the phone . Haha, I was extremely tired & only when I removed the battery (of course) did I realize what
had happened. Ever since the sim has been in, the signal has been unstable every 5-10-15 to 30 minutes (this is without running POGO). By
unstable, I mean both data & most importantly calls. I won't be able to make or receive, when I place the call during these failures it will
say dialing, connecting... and just continue until "call ended". And when I"m called, outside of LTE just say we've forwarded your call to VM. On
LTE, it will say something along the lines of this customer isn't able to receive your call at the moment.
Troubleshooting Attempts:
- Tried SIM in a different phone & it worked perfectly
- Power Cycled Several times, Factory reset it 3 times
- Set up 2 APN's (sorry can't link yet, but google them if u like they're ez to find. LG G4 VM Canada APN's)
- ^ Tried both, both unstable, but PDA gives most stability
- I've registered to all available networks under GSM/HSPA/LTE all unstable
- Connected Automatically & Manually to GSM/HSPA/LTE together & separately. All unstable
- Phone is not in Air Plane mode
Model: LGH812
Unlocked, Original Carrier: Rogers
Current Carrier: Virgin Mobile (Canada)
Android OS: Marshmallow
Kernal Version: 3.10.84
Build Number: MRA58K
Software Version: H81220x
Now, I have just recently come across a very interesting development. Using the App Network Signal Refresh Lite,
In pokemon go I've been able to transition to a signal that will stay solid for up to 5 minutes, 3 on average. It will still
lose connection, but will usually reconnect in-app in moments. I do have to minimize it & do a refresh again in NSRL
every now and then but it's a big improvement. Before hand, when I would use go, the service (calls included) would
completely rip in seconds.
So... any ideas? I'll appreciate any & all help.

I've flashed every stock rom I can for the device too, but the signal continues to drop regardless of the OS. Some error messages I' ve gotten are emergency calls only, no service & service disabled but usually it just shows that its connected to virgin but I can't make or receive calls.
Other than the cellular service, everything else with the phone works perfectly. The wifi, the camera, the gps, etc it would be a shame to have to get rid of it but the essentials first. I have to be able to make calls.
Please, anyone, any ideas? Are there any apps I can install to fix the broadband or something.

It won't remain stable no matter what I do... and no one has any solutions
tips, thoughts or ideas? Really regretting this purchase now... It's been a
month and I still cannot get a stable connection. This is ridiculous.

Unoder said:
I've flashed every stock rom I can for the device too, but the signal continues to drop regardless of the OS. Some error messages I' ve gotten are emergency calls only, no service & service disabled but usually it just shows that its connected to virgin but I can't make or receive calls.
Other than the cellular service, everything else with the phone works perfectly. The wifi, the camera, the gps, etc it would be a shame to have to get rid of it but the essentials first. I have to be able to make calls.
Please, anyone, any ideas? Are there any apps I can install to fix the broadband or something.
Click to expand...
Click to collapse
Where did you find the stock rom for virgin mobile?

Unoder said:
It won't remain stable no matter what I do... and no one has any solutions
tips, thoughts or ideas? Really regretting this purchase now... It's been a
month and I still cannot get a stable connection. This is ridiculous.
Click to expand...
Click to collapse
You may want to check out this link (https://lg-firmwares.com/lg-h812-firmwares/) for an H81220X Bell/Virgin kdz (H81220x_00_1122.kdz) and use LGUP-NEW to install it. It might help but if not, you may be facing a hardware issue ...

Solved lg g4 losing signal
I bought my lg g4 K450 and within days l noticed my phone was losing signal constantly. By the grace of God l tried this and it worked.
Go to settings---Then to Network---To more---To Mobile networks----To network operators. Select search network. All available networks will be displayed after a thorough scan. Select your network provider with a WCDMA instead of GSM and it will register it. After it done registering, restart the phone. and u are good to go. It worked for me, if it works for u give glory to God.
By [email protected]
+233202997578

Problem solved
Settings>battery and power savings>battery percentage on the status bar> off

Connection issues with 4G/LTE

Hey!
I've had my Oneplus 3 for a couple of weeks now, and I am having major connection issues while using mobile data. Most of the time I am unable to get any connection so I can't even make a phone call. I have read about similar issues and how they have been resolved, but none of the tricks have done it for me. If I enable airplane mode and then disable it, I get a weak connection for a while (maybe 10 minutes). I have two IMEI-codes on my phone, like I should. WiFi connection works well. I am on OOS 3.2.4 at the moment.
Here's a list of all the things that I have tried:
Another SIM-card
Another service provider
Manual APN settings
Different OS versions
Turning radio off and on from the "secret menu" (*#*#4636#*#*). This has the same effect as the airplane mode, which means that I get a weak connection for a moment.
Every bit of help is greatly appreciated.

I had the same problem with 6 ROM (all based on CM). After a day or so i lost connection.
Now i'm on Official CM13 and its all working for 4 days (fingers crossed).
The only thing that i've done different is that i didn't use Titanium Backup and also CMThemer.
I don't know how helpful this is, but that's my experience with the matter.
Cheers !

I am having same issue from the day 1 of my usage. Upgraded OxygenOS, tried different SIMs, changed APN, toggled preferred connection LTE to 3G etc and even on Official Cm13, the issue persists. Even when I am outdoors, the connection is poor and unstable. The same SIM works very well on Oneplus 1 without any issues. I am really fed up and regretting my choice to buy Oneplus 3. Is there any way to solve this issue? I stay in Dubai and there are no Oneplus service centers here and neither I can return the device, as the return period has expired.

Cant use mobile internet whıle on call

hi there,
i am new with OnePlus, and am i really so happy from that decision.
just i need one strange question. While on phone call i cant use internet connection on my both service provider ( different gsm companies btw ). even my old M7 was able to done that. have i done something wrong on settings? or this is like that?
thnx
regards

I can't use internet while on call me neither

No issues here. But I'm using a single sim for both data and call.

Iam on OOS 8.1 beta 4 using 2 sims, same can't use 4g when on call but only sometimes I have noticed my 4g drops down to 3g while on call, there should be a solution to this, I am gonna try some 4g booster apps from play store lets see if they help, cheers everyone.

Don't think this is an issue. I don't recall I could do this ever on any phone. But if you are connected on wifi there is no trouble at all. Guessing you can't do both ?

diminou91 said:
Don't think this is an issue. I don't recall I could do this ever on any phone. But if you are connected on wifi there is no trouble at all. Guessing you can't do both ?
Click to expand...
Click to collapse
there's an option in "developers options" "mobile data always active" , if u read the little detail underneath it it says mobile data will be on even if the WiFi is connected I presume this way both will be on, but I still don't know if mobile data disconnects at the time of making a call, but I will experiment and see what happens, cheers.

I had the same issue on my OnePlus3 a while ago. I haven't encountered it on the 5T though. I'll try to look for a solution when I get home. In school atm.

I'm using turkey Vodafone and when I'm on call i can use internet but it drops to 3g from 4g, unless you use volte its normal when it drops to 3g.

Yep definitely an issue. I'm Virgin Media and EE
Don't remember it being the case on the OP3 but could be wrong

On op3 I remember having the same issue. And note 3 and note 1 too. That's why I don't think it's an issue per say. Maybe a wrong implementation or something. Can maybe be fixed by a piece of code (magisk or xposed)?

Connectivity issues

Hello,
I have the global version of the mi9SE and experiencing very annoying issues when trying to access certain websites OVER MOBILE NETWORK (WIFI works) which returns errors as per attached screen shots, reporting certain sites (banking particulary) as can't be found or offline.
I temporarily managed to fix the issue by changing APN settings from IPV6 to IPV4 as per a suggestion on the forum of my French network carrier. Unfortunately with the update to android 10 and MIUI 11 erased these settings and now 4g or 3g for that matter simply fails to connect over IPV4 setting after update so I’m back to square one which is immensly irritating.
I can’t work out if this is a carrier issue or a software bug. I’ve tried the following :
- Changing Sim to another phone. No problems there.
- Changing browser. Both chrome and edge are the same as well as the native browser.
- Contacting bank who tell me issue not unheard of but have no solution.
- Contacting my carrier who claim not to have an answer.
I haven’t tried another sim in the handset.
Help would be much appreciated.

Hi
I also use French carrier, bouygues, using android 10 miuimix, just tried ing website and it works fine through 4g.
Have you tried a different ROM? You should have a menu to erase connectivity data in settings may be it could help

Cosmox_ said:
Hi
I also use French carrier, bouygues, using android 10 miuimix, just tried ing website and it works fine through 4g.
Have you tried a different ROM? You should have a menu to erase connectivity data in settings may be it could help
Click to expand...
Click to collapse
Hi thanks for your reply. Vey strange, I too am on Bouygues network and ING website doesn't work for me.
However I must point out that it is the secure part of the website that doesn't work so logging into the "espace client" part of the account, the home page DOES work. Same for you or not ?
I don't understand how it can only be me experiencing this issue which I've had for months now despite doing a factory reset, formatting etc. I'm using the stock global rom OTA from Xiaomi. I surely shoudln't have to flash another rom to get a working phone. I take it Miuimix is a ROM you're using on the Mi9SE ? Just how stable and secure is it ?
tks

MY WIFI hotspot won't work either. It connects to the network but refuses to connect to the internet. No such problem when placing the same sim into another phone and setting up the same hotspot. Could this be a problem with my device hardware I wonder ? I haven't done anything in particular...but these issues weren't there when I first bought the device.

For Hotspot I guess it's related to Android 10 update...
Just tried the secure part of the ing website and indeed it doesn't work for me neither on 4g. But Hotspot works fine.

Cosmox_ said:
For Hotspot I guess it's related to Android 10 update...
Just tried the secure part of the ing website and indeed it doesn't work for me neither on 4g. But Hotspot works fine.
Click to expand...
Click to collapse
Great thanks so much for trying at least I know it isn't just and so can conclude an issue with MIUI and the phone. Strange how adjusting VPN settings to IPV4 used to work but now doesn't. I fear the issue is embedded into the OS and I'll probably never find a solution . Wouldn't be so bothered if this was the only site but it's not. I first thought it was just a problem with the websites, then realized it wasn't when the same sites worked over WIFI.
As for the WIFI hotspot issue, still no solution to this problem. The same sim is fine in my Motorola and connects to the internet perfectly over 5ghz band. If I try 5ghz band on the SE, windows simply reports "unable to connect to the network" and over the 2.4ghz the device network will connect but reports "no internet".
It doesn't sound as If the two issues are related from what you say. Is it possible it's the windows firewall blocking the Xiaomi but not the motorola ?

Please post radio issues (and fixes) here

**EDIT**
Forgot the random outgoing call issue.
Since getting my OP8P, it doesn't seem like any of the radio issues have really been satisfactorily addressed. I'm not sure if there is anything that can be done on our end to fix them, but I figured I'd create a thread to track them, and fix them if possible.
Please include your carrier, or any other differentiating factors:
MMS issues (T-Mobile): MMS messages do not come in reliably or at all with wifi enabled. SMS and RCS messages are not affected.
Fix: (Workaround) Disable VoWifi, which doesn't seem to work on as many APs as the OP7P and prior did. If that doesn't work, turn off wifi altogether to allow messages to send/receive.
--------------------------------------------------------
Wifi calling issues (T-Mobile): Wifi calling will not stay activated. Icon appears for about 30 seconds after turning on wifi. Also seems to be affecting MMS messages not sending/receiving when connected to WiFi, and potentially outgoing calls not going through reliably.
Fix: (Workaround) Possibly affected by APs that allow TKIP encryption method. Reports of only allowing AES/CMAK helping. TKIP has known vulnerabilities, but older devices may still require it be enabled.
--------------------------------------------------------
Wifi connection issues: Wifi seems to go dead 1-3 times a day. Wireless still shows a strong connection, but no data actually passes (SMS still works).
Fix: (Workaround) toggle wifi
--------------------------------------------------------
Poor 5G performance (T-Mobile): While this could be a T-Mobile issue, as they seem to have turned on 5G over most of our area using UHF bands (300mhz to 3ghz), performance is pretty choppy. Uploads seem to be more negatively affected, with speeds less than 1mbps at times. Download speeds can be up to LTE speeds, but often are not, and are almost always jumpy and not smooth during speed tests.
Potential fix: Disable 5G under: SIM & network settings > Preferred network type
--------------------------------------------------------
Occasion outbound call issue: Sometimes making an outgoing call takes 2 or 3 tries. I can't remember the error, off the top of my head, but it's something like "service not available".
--------------------------------------------------------
Can ONLY receive MMS on WiFi calling not on mobile data, SMS not affected. (details here)
Fix: use 3rd party SMS app, revoke all permissions from stock app, disable stock app

Flapjack said:
Since getting my OP8P, it doesn't seem like any of the radio issues have really been satisfactorily addressed. I'm not sure if there is anything that can be done on our end to fix them, but I figured I'd create a thread to track them, and fix them if possible.
Please include your carrier, or any other differentiating factors:
MMS issues (T-Mobile): MMS messages do not come in reliably or at all with wifi enabled. SMS and RCS messages are not affected.
Fix: (Workaround) Turn off wifi. Not really feasible, though... especially those not on unlimited data plans.
--------------------------------------------------------
Wifi calling issues (T-Mobile): Wifi calling will not stay activated. Icon appears for about 30 seconds after turning on wifi.
Fix: (Workaround) Possibly affected by APs that allow TKIP encryption method. Reports of only allowing AES/CMAK helping. TKIP has known vulnerabilities, but older devices may still require it be enabled.
--------------------------------------------------------
Wifi connection issues: Wifi seems to go dead 1-3 times a day. Wireless still shows a strong connection, but no data actually passes (SMS still works).
Fix: (Workaround) toggle wifi
--------------------------------------------------------
Poor 5G performance (T-Mobile): While this could be a T-Mobile issue, as they seem to have turned on 5G over most of our area using UHF bands (300mhz to 3ghz), performance is pretty choppy. Uploads seem to be more negatively affected, with speeds less than 1mbps at times. Download speeds can be up to LTE speeds, but often are not, and are almost always jumpy and not smooth during speed tests.
Fix: None, unless there's a way to disable 5G for now (if that would even help).
Click to expand...
Click to collapse
You can disable 5G in the SIM and Network settings ??*

With my old phone if I disable wifi it connects to Lte instantly and I can start surfing. With my 1+ now if I disable wifi it takes about 10sec until there's Lte but I can't start surfing. I have to switch from Lte to 2g and back to get it working. Same Sim in both phones

XD-MOD2-9MM said:
You can disable 5G in the SIM and Network settings ??*
Click to expand...
Click to collapse
Good grief. I have no idea how I missed that. Thanks! I'll test and update the thread if LTE performance seems better than 5G. This very well could be a T-Mobile thing, since they just recently turned it on in my area.
Flatric said:
With my old phone if I disable wifi it connects to Lte instantly and I can start surfing. With my 1+ now if I disable wifi it takes about 10sec until there's Lte but I can't start surfing. I have to switch from Lte to 2g and back to get it working. Same Sim in both phones
Click to expand...
Click to collapse
I have noticed the exact same thing. I'm not sure why it takes so long... especially with dual-channel network acceleration enabled (and the fact that VoLTE is established before I shut wifi off).

Flapjack said:
**EDIT**
Forgot the random outgoing call issue.
Since getting my OP8P, it doesn't seem like any of the radio issues have really been satisfactorily addressed. I'm not sure if there is anything that can be done on our end to fix them, but I figured I'd create a thread to track them, and fix them if possible.
Please include your carrier, or any other differentiating factors:
MMS issues (T-Mobile): MMS messages do not come in reliably or at all with wifi enabled. SMS and RCS messages are not affected.
Fix: (Workaround) Turn off wifi. Not really feasible, though... especially those not on unlimited data plans.
--------------------------------------------------------
Wifi calling issues (T-Mobile): Wifi calling will not stay activated. Icon appears for about 30 seconds after turning on wifi.
Fix: (Workaround) Possibly affected by APs that allow TKIP encryption method. Reports of only allowing AES/CMAK helping. TKIP has known vulnerabilities, but older devices may still require it be enabled.
--------------------------------------------------------
Wifi connection issues: Wifi seems to go dead 1-3 times a day. Wireless still shows a strong connection, but no data actually passes (SMS still works).
Fix: (Workaround) toggle wifi
--------------------------------------------------------
Poor 5G performance (T-Mobile): While this could be a T-Mobile issue, as they seem to have turned on 5G over most of our area using UHF bands (300mhz to 3ghz), performance is pretty choppy. Uploads seem to be more negatively affected, with speeds less than 1mbps at times. Download speeds can be up to LTE speeds, but often are not, and are almost always jumpy and not smooth during speed tests.
Fix: None, unless there's a way to disable 5G for now (if that would even help).
--------------------------------------------------------
Occasion outbound call issue: Sometimes making an outgoing call takes 2 or 3 tries. I can't remember the error, off the top of my head, but it's something like "service not available".
Click to expand...
Click to collapse
My wife and I have similar problems with mobile data and wifi both occasionally showing strong signals but requiring a toggle off and back on before data passage resumes. Both OP8P and OP8. Verizon for carrier.

Well, I guess it's good to know it's happening on Verizon too?
Seriously, this needs to be fixed. If it was just one carrier, I could see it getting out the door. But more than one (very different kinds) of carriers is pretty ridiculous.

Issue: can ONLY receive MMS on WiFi calling not on mobile data, SMS not effected.
More details in my thread here: https://forum.xda-developers.com/oneplus-8-pro/help/receive-mms-wifi-calling-tmobile-t4088673
Fix: use 3rd party SMS app, revoke all permissions from stock app, disable stock app

Updated OP.

I've found that disabling Voice over Wifi altogether seems to help with the MMS while on wifi issues. I still get a few that don't go through and have to shut off wifi altogether, but it's much... much better.
I'm wondering if this is also connected to my outgoing call issues. I'll be testing that also.
**EDIT**
While I still think disabling VoWiFi helps, it is still very much a crapshoot whether or not an MMS message will send or receive. Between this and the dual sim issues, I may need to see if OP will let me return this.

No idea if it's related but in comparison to EE, three is absolutely crap. Truly a horrific network, 50% of the coverage and 59% of the speed.
Have noticed that the phone aggressively tries to hand over to WiFi even when I'm not connected.
Removing 5G from the equation helps a lot, least in my instance.

dladz said:
No idea if it's related but in comparison to EE, three is absolutely crap. Truly a horrific network, 50% of the coverage and 59% of the speed.
Have noticed that the phone aggressively tries to hand over to WiFi even when I'm not connected.
Removing 5G from the equation helps a lot, least in my instance.
Click to expand...
Click to collapse
Curious, how are you seeing it's trying to hand over to wifi?
I'm so upset over this stuff. It would be more tolerable if OP had some sort of official status on some of these issues. Ignoring them won't make them go away.

Flapjack said:
Curious, how are you seeing it's trying to hand over to wifi?
I'm so upset over this stuff. It would be more tolerable if OP had some sort of official status on some of these issues. Ignoring them won't make them go away.
Click to expand...
Click to collapse
So it looks for WiFi constantly, also tries to switch between networks. You can disable it

dladz said:
So it looks for WiFi constantly, also tries to switch between networks. You can disable it
Click to expand...
Click to collapse
Are you talking about the "Scanning always available" setting? I already have that disabled. I seem to be ok with 5G lately. Pretty sure the bad upload speeds are just due to T-Mobile working out the bugs.

Flapjack said:
Are you talking about the "Scanning always available" setting? I already have that disabled. I seem to be ok with 5G lately. Pretty sure the bad upload speeds are just due to T-Mobile working out the bugs.
Click to expand...
Click to collapse
Then you're fine. Don't worry about it.

I thought I'd chime in a bit with T-Mobile 5G. Minus specialized cities featuring higher frequency 5G, T-Mobile nationwide works off of the 600Mhz band, AND REQUIRES the 1900Mhz or 2100Mhz 4G LTE band to properly function at this time. So if you experience poor 4G 1900 and 2100 frequency in your area, but strong 5G, it won't work well for you, and you are better off doing 4G LTE 600mhz instead.
Call your local rep and confirm the strength for those two frequencies for you. Just thought I'd chime in about the poor 5G performance nationwide for T-Mobile for some. Nothing to do with the phone exactly.

My OnePlus 8Pro sometimes disconnects several times a day the radio conection. It's hapend with LTE on Telekom. 5G is not available yet. It's happend also in places where I have very good LTE network coverage.
Restart the cell phone is the only option to reconnect.
Switching OFF/ON the Airplane-Mode, reset network settings or a Full Wipe bring no improvement.
I have already replaced the SIM card against a new one by my network provider (Telekom) to rule out a defect.
I also have no problems with my previous device.
So I'm currently using my old device in parallel with a Multi-Sim.
A network fault therefore can be ruled out 100%.
The latest software version has also been installed.
The crash normally occurs while surfing the LTE network and is noticeable that the Internet is unexpectedly no longer working. The Radio display on the phone show me a few minutes more that i have still connection to LTE and than it jump to "no network" as already described, "ONLY" restarting the device allows to log in to the network again.
It was also tried with intelligent network connection or two-channel download acceleration on and off.
With WiFi the internet works continuously.
The Device runs with Stock-Rom.
I also have contacted the OnePlus Support, but maybe someone here has a solution for me.
Many Thanks

Hofitown said:
My OnePlus 8Pro sometimes disconnects several times a day the radio conection. It's hapend with LTE on Telekom. 5G is not available yet. It's happend also in places where I have very good LTE network coverage.
Restart the cell phone is the only option to reconnect.
Switching OFF/ON the Airplane-Mode, reset network settings or a Full Wipe bring no improvement.
I have already replaced the SIM card against a new one by my network provider (Telekom) to rule out a defect.
I also have no problems with my previous device.
So I'm currently using my old device in parallel with a Multi-Sim.
A network fault therefore can be ruled out 100%.
The latest software version has also been installed.
The crash normally occurs while surfing the LTE network and is noticeable that the Internet is unexpectedly no longer working. The Radio display on the phone show me a few minutes more that i have still connection to LTE and than it jump to "no network" as already described, "ONLY" restarting the device allows to log in to the network again.
It was also tried with intelligent network connection or two-channel download acceleration on and off.
With WiFi the internet works continuously.
The Device runs with Stock-Rom.
I also have contacted the OnePlus Support, but maybe someone here has a solution for me.
Many Thanks
Click to expand...
Click to collapse
That is crazy. I think they may have fixed the wifi disconnects for me with the latest OTA, but when I did get them, toggling wifi worked for me. I never had to reboot over it. Your case definitely seems worse. Hopefully you don't have a hardware issue.

Hofitown said:
My OnePlus 8Pro sometimes disconnects several times a day the radio conection. It's hapend with LTE on Telekom. 5G is not available yet. It's happend also in places where I have very good LTE network coverage.
Restart the cell phone is the only option to reconnect.
Switching OFF/ON the Airplane-Mode, reset network settings or a Full Wipe bring no improvement.
I have already replaced the SIM card against a new one by my network provider (Telekom) to rule out a defect.
I also have no problems with my previous device.
So I'm currently using my old device in parallel with a Multi-Sim.
A network fault therefore can be ruled out 100%.
The latest software version has also been installed.
The crash normally occurs while surfing the LTE network and is noticeable that the Internet is unexpectedly no longer working. The Radio display on the phone show me a few minutes more that i have still connection to LTE and than it jump to "no network" as already described, "ONLY" restarting the device allows to log in to the network again.
It was also tried with intelligent network connection or two-channel download acceleration on and off.
With WiFi the internet works continuously.
The Device runs with Stock-Rom.
I also have contacted the OnePlus Support, but maybe someone here has a solution for me.
Many Thanks
Click to expand...
Click to collapse
I have exactly the same issue with the same carrier (Telekom Germany) with 2 SIM cards tested. Gotten worse with the 10.5.9 so I rolled back to 10.5.8 where the issue isn't happening that often. I haven't got this issue when enabling data on my secondary SIM (O2 Germany). I have also tested the new Android 11 beta where I got shortly disconnected from the mobile network and then the LTE+ logo changed to "g" and everything was fine again. The phone was still connected to LTE with full DL speed (did the whole initialisation with mobile data + 20gb music download). However the beta is not usable at this stage. Since I have an unlimited data plan on that Telekom Sim I cloud test the **** out of it and it seems that the disconnect happens when the phone tries to change or adds the cell connection while using data. I have sent OP the required logs and after that they ignored me.. hope they going to fix this as it seems to be a software/compatibility issue with that certain carrier. Also 10.5.9 isn't really coming to German devices with ota so they might know about that issues.

ch1llahh said:
I have exactly the same issue with the same carrier (Telekom Germany) with 2 SIM cards tested. Gotten worse with the 10.5.9 so I rolled back to 10.5.8 where the issue isn't happening that often. I haven't got this issue when enabling data on my secondary SIM (O2 Germany). I have also tested the new Android 11 beta where I got shortly disconnected from the mobile network and then the LTE+ logo changed to "g" and everything was fine again. The phone was still connected to LTE with full DL speed (did the whole initialisation with mobile data + 20gb music download). However the beta is not usable at this stage. Since I have an unlimited data plan on that Telekom Sim I cloud test the **** out of it and it seems that the disconnect happens when the phone tries to change or adds the cell connection while using data. I have sent OP the required logs and after that they ignored me.. hope they going to fix this as it seems to be a software/compatibility issue with that certain carrier. Also 10.5.9 isn't really coming to German devices with ota so they might know about that issues.
Click to expand...
Click to collapse
Thanks for the feedback.
That the Problem with 10.5.9 got worse i can confirm. I loaded this Version in Germany by using the Oxygen Updater. But that gives hope to me that it is really just a software issue and no defekt on the device. So I will not send the device to OP for an unnecessary repair in the hope that there will be fixd with an update soon.
On the Facebook Oneplus page I have already heard from some people they have exactly the same problem, all of them use the German Telekom network.
Hopefully you get right, with that presumption, that 10.5.9 isn't really coming on German devices because they know the problem. So the fix will come very fast.

Hofitown said:
Thanks for the feedback.
That the Problem with 10.5.9 got worse i can confirm. I loaded this Version in Germany by using the Oxygen Updater. But that gives hope to me that it is really just a software issue and no defekt on the device. So I will not send the device to OP for an unnecessary repair in the hope that there will be fixd with an update soon.
On the Facebook Oneplus page I have already heard from some people they have exactly the same problem, all of them use the German Telekom network.
Hopefully you get right, with that presumption, that 10.5.9 isn't really coming on German devices because they know the problem. So the fix will come very fast.
Click to expand...
Click to collapse
You guys haven't heard any buzz about 10.5.10 yet? I'm on 10.5.10 in the US, which I feel has been a lot more stable than the previous two versions (which had alternating issues for me).
The biggest issue affecting me remains the issues sending MMS while on wifi.