Develop Bugs

Sim card error, can't call, I have signall

Hey... Can someone pls help me... I have this issue for 1 month and I don't know what to do to fix it, I tried to reflash rom, change radio (found just another one) but same problem.... I have to restart my phone sometimes to fix this issue... Or sometimes it just says preparing sim card while I'm playing and it s ok after
Sent from my HTC One X
Sorry for my English, pls help me to fix this issue

At least delete your imei number in the first picture ! Internet in not so safe as many people think !!!

no ideeas(?

Uhm....try to put the phone in GSM mode only. It seems to help increase signal strength in bad covered areas

Mr Hofs said:
At least delete your imei number in the first picture ! Internet in not so safe as many people think !!!
Click to expand...
Click to collapse
ohhh. what are the possible consequences

Lg g4 cant download marshmallow update OTA

I received notifaction about a new software update and its being downloaded .. When i left wi-fi coverage and went back it didnt resume so i restarted my phone and it doenst resume since then .. Though i have both data service and wi-fi working .. I guess the problem might be that the pacakge it partially downloaded has been corrupted somehow and needs to be removed so it can start fresh but i dont know thr name of package or where can i find it .. Please help

Try with Lg Bridge

Same here - but I solved this problem.
It's as easy as it sounds! - Get in Touch with the LG-Chat-Support and tell them about your problem. They will ask for your IMEI and only about 48h at max. you will receive the OTA-Info on your screen, like it was on mine!
It's something because of IMEI's and their registrations... ask the Support for further details.
Take a look on this thread - explained the exactly same problem there as a sidenote.
Read me!

4G and SMS access , but cant make calls on SIM slot 1

Hello Professionals
I Just got my Lenovo P2a42 , was playing with an app called " Activity launcher" to hide the screen orientation using demo mode activity, thus i got nosy some how .. and changed the band to USA without knowing .
end result which only happened on Sim Slot 1
1. i cant make or receive calls
2. can send SMS and access internet using sim slot 1
3. when making a call , a message appears :" cellular network not available"
I have tried other Sim cards on slot 1 , and nothing working (no calls)
tried slot 2 and all is working great
any suggestion on what to do to restore the phone Radio band to its non US band ? I am not located in USA , I'm in UAE
I'm on android Nougat , non-rooted , phone is carrier free
HELP HELP HELP

mysterious.one said:
Hello Professionals
I Just got my Lenovo P2a42 , was playing with an app called " Activity launcher" to hide the screen orientation using demo mode activity, thus i got nosy some how .. and changed the band to USA without knowing .
end result which only happened on Sim Slot 1
1. i cant make or receive calls
2. can send SMS and access internet using sim slot 1
3. when making a call , a message appears :" cellular network not available"
I have tried other Sim cards on slot 1 , and nothing working (no calls)
tried slot 2 and all is working great
any suggestion on what to do to restore the phone Radio band to its non US band ? I am not located in USA , I'm in UAE
I'm on android Nougat , non-rooted , phone is carrier free
HELP HELP HELP
Click to expand...
Click to collapse
At dialer press "*#*#4636#*#*" then phone information and press top right three dots. There is an option for area band. Choose your area. I'm not sure if this will solve your problem but try it

chtsarts said:
At dialer press "*#*#4636#*#*" then phone information and press top right three dots. There is an option for area band. Choose your area. I'm not sure if this will solve your problem but try it
Click to expand...
Click to collapse
Thanks for your prompt reply brother .. i have tried that , the only available band is USA .. nothing else

I have done the factory reset , didnt resolve it .. if any one can help , please do
read on some articles about flashing original radio .. any suggestions ? please help me

mysterious.one said:
I have done the factory reset , didnt resolve it .. if any one can help , please do
read on some articles about flashing original radio .. any suggestions ? please help me
Click to expand...
Click to collapse
Flash twrp recovery and flash either the stock rom or custom. Just google for the links. If your bootloader isn't unlocked you will have to wait 14 days. Hope it helps

i have sent the phone back to lenovo service center .. i just got the phone 8 days ago

No signal, no wifi, no gps

Hello you guys!
I just received my lg g7 g710ulm. And when i turned on the phone i understood that im not lucky.. I need your helps! Please! Because i cant do it myself.
1. No signal. Don't search networks. Immediately getting error when trying to do it myself. "Preferred network mode" can't change due error and it showed "null". After reflashing it's now showing "22".
2. Don't see any wifi networks. But access point is working and other devices can see me.
2.1 I found that wifi going to work then i tried to use gps. After few seconds phone starting see wifi networks and connecting. If turn off wifi and turn on again phone don't see networks and you need to repeat procedure.
3. Looks like gps not working too.. But tried only in indoor.
I can't understand is it software or hardware issue. Maybe seller changed imei number and model by firmware and did it wrong? Antutu showing strange imei.
Can i to know somehow real model of phone? I can try to make logs and attached it here. Or maybe somebode can check imei, bands with octopus box? I dont know what to do
P.S. Bluetooth is working. Tried to send file and it was fine.
I can't return phone to shop because im living in different country But phone is amazing! And I loved lg. I had lg optimus one (was lost and back by good people), then lg optimus black(was burned in bonfire), lg g2(left in taxi), lg g6 (was lost) and finally lg g7. Yeah, looks like something wrong with me or these lg.. But i love it

Did you put in your SIM card first before you started...
I read you need to insert sim first but could be wrong.

sas007 said:
Did you put in your SIM card first before you started...
I read you need to insert sim first but could be wrong.
Click to expand...
Click to collapse
Sure, i did it. Anyway don't search networks. But what carrier of sim card and numbers into sim card, phone can recognise.
Maybe i wrote not understandable? My english not first language. So asking. I will try to explain.
Thanks for your reply.
I uploaded a log file with errors but cant to write here link, because i need 10 messages

My G710ULM's GPS stopped working 2 days ago, still trying to find out what's the cause of it. Tried apps like GPS Status, GPS Locker, no avail that it isn't picking any satellites at all. Just searching for GPS location. Restarting the device haven't helped either. In settings I even excluded all apps in Power Saving Exclusions. In GPS Status app, resetted and downloaded the A-GPS, this should surely make the GPS work. No success.

deonin said:
Hello you guys!
I just received my lg g7 g710ulm. And when i turned on the phone i understood that im not lucky.. I need your helps! Please! Because i cant do it myself.
1. No signal. Don't search networks. Immediately getting error when trying to do it myself. "Preferred network mode" can't change due error and it showed "null". After reflashing it's now showing "22".
2. Don't see any wifi networks. But access point is working and other devices can see me.
2.1 I found that wifi going to work then i tried to use gps. After few seconds phone starting see wifi networks and connecting. If turn off wifi and turn on again phone don't see networks and you need to repeat procedure.
3. Looks like gps not working too.. But tried only in indoor.
I can't understand is it software or hardware issue. Maybe seller changed imei number and model by firmware and did it wrong? Antutu showing strange imei.
Can i to know somehow real model of phone? I can try to make logs and attached it here. Or maybe somebode can check imei, bands with octopus box? I dont know what to do
P.S. Bluetooth is working. Tried to send file and it was fine.
I can't return phone to shop because im living in different country But phone is amazing! And I loved lg. I had lg optimus one (was lost and back by good people), then lg optimus black(was burned in bonfire), lg g2(left in taxi), lg g6 (was lost) and finally lg g7. Yeah, looks like something wrong with me or these lg.. But i love it
Click to expand...
Click to collapse
I can fix it. Send me a PM.

Resolution?
Hi in having the same issues with my G7 thinq... I was wondering if you guys found a resolution for this issue?

5centr5 said:
I can fix it. Send me a PM.
Click to expand...
Click to collapse
Hello expert. I have an LG G7 ThinQ ULM phone. The problem of this phone is no phone waves signal, 3G, 4G. (a week ago that is good). I think that because the SIM and insert this SIM into other phones, this SIM still works very well. So can you show me how to fix it? Thank you very much!
Note: I was try as below but not success
Go to the Home screen;
Tap on the Phone app;
Switch to the Dial pad;
Type in (*#*#4636#*#*) and just wait – the phone should automatically redirect you to the Service mode;
Once you’ve entered this new mode, tap on Phone Information or Device Information;
Tap on Run Ping test;
Look for the button labeled as Turn Radio Off and select it;
Wait for the phone to restart;
Tap on reboot.

Problem on LG G710ULM OF WIFI, GPRS, SIM CARD READING
Hello i have the same problem on my LG G7 i buyed this motherboard but just problem again . please if you find a way to fix this. someone tell me how to do it :highfive:

hello i have the same problem. no wifi, no network.. enable radio in service menu not resolved problem... any solution??

Solution? I have the same problem

I can fix it with TV for little bucks.

got the same problem after trying to update

I've got the same problem after flashing the android 10 update. Tried android pie and oreo but nothing helped. I will really appreciate any help as this is my daily driver.

my imei wifi mac still exist and working but the problem still persist
update:
finally got my network working all you need is an original qcn backup or flash original modem_a,b partition with QFIL if imei shows null use this tutorial to change ur origin imei/MEID, im not gonna give full tutor or the file since no one answered me, good luck.

kunarbale said:
my imei wifi mac still exist and working but the problem still persist
update:
finally got my network working all you need is an original qcn backup or flash original modem_a,b partition with QFIL if imei shows null use this tutorial to change ur origin imei/MEID, im not gonna give full tutor or the file since no one answered me, good luck.
Click to expand...
Click to collapse
hi, i need help, same mistake, i dont get a solution

Hi guys, I bring a solution to this problem, I found this topic: https://forum.xda-developers.com/t/no-signal-after-crossflashing.4089281/, you understood better by reading yourselves, but basically I flashed the rom with lg up chip erase mode and my wifi/data started working again, I know this is not recommended under any circumstances but it worked for me.

However, be aware that ChipErase mode not only erases IMEI numbers, but also erases MAC addresses, EFS partition and others. In many countries if your device does not have an IMEI number or other identifiers, SIM networks cannot allow (my case in Brazil it worked) for you to register with them, i.e. in most cases your sim will not work on the phone and you will not have cell service. You may still have issues with WiFi networks as without MAC addresses your WiFi will be grayed out or the network may not allow you to connect. Also, be aware that in many countries around the world knowingly tampering with or changing your phone's IMEI numbers is against the law. IMEI number is how networks and ultimately law enforcement identify the device and its owner

kunarbale said:
my imei wifi mac still exist and working but the problem still persist
update:
finally got my network working all you need is an original qcn backup or flash original modem_a,b partition with QFIL if imei shows null use this tutorial to change ur origin imei/MEID, im not gonna give full tutor or the file since no one answered me, good luck.
Click to expand...
Click to collapse
hi can i use this method to fix my wifi problem? my wifi cant be turn on at all after so many change of roms, it does work on every firmware i used. i need a help

Question Xiaomi Random Restart

Hello,
I've bought my Xiaomi 12X in May 2022 and for a couple of months I was able to use it without any issues.. After a while I started to get random restarts , in different apps , in different periods of the day in different conditions ( wifi , 4g , bluetooth , etc.).
I've contacted Xiaomi they told me to perform a factory reset. I've done it without sucess.
I've tried already different ROMS ( MIUI 13 and MIUI14 dev) and the problem is still persisting.
Does anyone have a clue of what could be happening ? Any troubleshoot that I can perform ?
Thanks in advance for your help this is driving my crazy!

Bandeiri said:
Hello,
I've bought my Xiaomi 12X in May 2022 and for a couple of months I was able to use it without any issues.. After a while I started to get random restarts , in different apps , in different periods of the day in different conditions ( wifi , 4g , bluetooth , etc.).
I've contacted Xiaomi they told me to perform a factory reset. I've done it without sucess.
I've tried already different ROMS ( MIUI 13 and MIUI14 dev) and the problem is still persisting.
Does anyone have a clue of what could be happening ? Any troubleshoot that I can perform ?
Thanks in advance for your help this is driving my crazy!
Click to expand...
Click to collapse
If after doing all this and it's the same, surely a hardware problem, send it back under warranty.

Ok thanks for the quick response.
Before I send it back to warranty do you think I shall lock it again ( I've done a MI Unlock in order to install a custom rom...) . I'm afraid they won't accept my phone back because i've installed a custom Rom. What do you think ?

Bandeiri said:
Ok thanks for the quick response.
Before I send it back to warranty do you think I shall lock it again ( I've done a MI Unlock in order to install a custom rom...) . I'm afraid they won't accept my phone back because i've installed a custom Rom. What do you think ?
Click to expand...
Click to collapse
Normally this is not a problem but doing it, with the latest stock rom, it will erase your data.
https://forum.xda-developers.com/t/flash-tool-guide-use-xiaomi-flash-tool.4262425/

Anyway before I send it back to Xiaomi , I was thinking checking the dump logs , do you know how to do it ? Or analyse the logs with logcat ? Do you have a procedure to do it ? I used to be programmer so I still have good technical knowledge

Bandeiri said:
Anyway before I send it back to Xiaomi , I was thinking checking the dump logs , do you know how to do it ? Or analyse the logs with logcat ? Do you have a procedure to do it ? I used to be programmer so I still have good technical knowledge
Click to expand...
Click to collapse
Especially for a software problem.
How to enable logging using ADB?
1) Settings -> My device -> All specs -> quick-tap "MIUI version" 7 times, until you see a toast notification that "you are a developer".
2) Settings -> Additional settings -> Developer options -> enable "USB debugging".
How to generate a log?
1) Download "adb.zip" and extract it anywhere you want.
2) Connect your device to your PC via USB.
3) Run "StartLog.bat" in the extracted folder.
* If an authorization dialog shows up on your device, click "Allow".
4) Reproduce the issue you're facing, i.e. if the issue is a crash in an app, open the app and let it crash.
5) Stop logging by closing the window that was opened by "StartLog.bat".

I use xiaomi.eu, so far I've experienced random restart two times. It was during phone calls. No idea why...

Bandeiri said:
Hello,
I've bought my Xiaomi 12X in May 2022 and for a couple of months I was able to use it without any issues.. After a while I started to get random restarts , in different apps , in different periods of the day in different conditions ( wifi , 4g , bluetooth , etc.).
I've contacted Xiaomi they told me to perform a factory reset. I've done it without sucess.
I've tried already different ROMS ( MIUI 13 and MIUI14 dev) and the problem is still persisting.
Does anyone have a clue of what could be happening ? Any troubleshoot that I can perform ?
Thanks in advance for your help this is driving my crazy!
Click to expand...
Click to collapse
I think this random restart is related to hardware problem... Previously i owned a Poco x3 Pro, That phone also has this random reboot issue... I tried resetting & even flash Android from Service center..but it didn't solve the issue. So i raised complaint in service center and they replaced my phone with a brand new redmi note 10 pro and a MI band.
So i recommend to visit service center and claim your warranty...

Hi Guys, please help me here.. because i'm getting really upset with Xiaomi and I don't know what to do anymore. I've just spend 1 month sending back and forth my phone to Xiaomi service and the phone sent back with the same issue , they didn't even bothered looking into the phone. They just said : "Cannot reproduce issue". Well actually they just updated it to MIUI14 , but after a while the phone keeps crashing and reboot. Can you guys help me ? Is there a way to get access to the crash logs , I want to proove to Xiaomi Service that my customer is constantly rebooting ? Alternatively Is there any possibility to perform overclock (or underclock) i've seen some post claiming that decreasing the CPU frequency was helping with reboots . Any other ideas ?

Finding a workaround is not a definitive solution, tell them that you still have the problem, possibly make a video proving your statements.

Thanks for the reply , but any idea how to make a video of a random reboot ? I've thought about this several times but I just cannot find the right timing.. since I don't know when the phone is going to crash ... it's just crazy.. other than filming my phone ( with another phone ) for 24 hours I cannot find another solution...

How else to prove this problem?
The phone is guaranteed and may have a motherboard problem, it is not up to you to prove the problem but to them to find the fault.
I don't know what country you are from, but I know that the after-sales service for Europe is deplorable (under-contracted).
If you bought the phone somewhere other than Xiaomi, you should contact the seller and not Xiaomi directly.

I confirm that the after-sales service for Europe is deplorable , i'm in France and i've sent the phone to the after sales in France. They have done nothing with the phone ! They just sent the phone back to me saying 'issue cannot be reproduced'. I really neeed to give them evidence of my issue... do you know where are the crash logs stored in the phone ?

Surely this company, look at the notes:
ceat-electronique.fr est noté « Bas » avec 2,1 / 5 sur Trustpilot
Êtes-vous d'accord avec le TrustScore de ceat-electronique.fr ? Exprimez-vous dès aujourd'hui et lisez ce que 127 clients ont déjà écrit.
fr.trustpilot.com
Regarding the logs on the stock roms, I don't know, not sure that they are accessible by the user.
The problem is that in the event of an app crash you can send a report but in the event of an intensive reboot this is not possible.

Yes, that's the service center in France and I've also checked their reputation in trustpilot and also on google reviews , they are really really bad. Moreover that company is almost bankrupted. But... what can I do ? Do you know any way to escalate this at an higher level at Xiaomi ? I'm always stuck with Xiaomi support center...
By the way ,i was able to get these logs from the stock ROM ( powerinfoFile).
---------- kernel abnormal reboot records ----------
kernel reboot : other
record time_stamp : 2023-01-18 09:32:19
------------------------------------
kernel reboot : reboot
record time_stamp : 2023-04-09 11:55:12
------------------------------------
kernel reboot : reboot
record time_stamp : 2023-04-10 20:36:44
------------------------------------
kernel reboot : reboot
record time_stamp : 2023-04-10 21:21:21
------------------------------------
kernel reboot : kpanic
record time_stamp : 2023-04-23 23:58:38
------------------------------------
miui reboot : framework
record time_stamp : 2023-04-24 10:18:55
------------------------------------

Who is the seller?Important
Send them these logs saying that the problem is still present, but given their reputation the task is difficult.
Even by contacting Xiaomi directly, they will refer you to this repair center.
Try an approved repairer or change the motherboard yourself, but it will pay off.
What follows engages only me.
What I would do if no reaction from them:
Short circuit via the USB port to burn out the motherboard, then say that the phone no longer works..
Whereas having a phone that works randomly is the same as no phone.
Straight or double.
A big risk given the reputation of the subcontractor.

nienic said:
I use xiaomi.eu, so far I've experienced random restart two times. It was during phone calls. No idea why...
Click to expand...
Click to collapse
I have the same. On my 12X xiaomi.eu beta. Since last year so far 5 times.
Do you have stable?

Hi Guys,
I NEED YOUR HELP , my nightmare is not over.
I’ve sent my phone again ( this is already the 2nd time) for official repairing, this time in switzerland. ( i've attached all the logs prooving that my phone has an hardware issue , showing all the kernel panics , all the fault errors , etc.).
They have sent back the phone saying : ‘Issue cannot be reproduced’.
I don’t know what to do anymore, any ideas ?
Cheers.