Develop Bugs

LG G3 4G Network Drops

So the problem I'm having with my G3 is that the Network either drops and comes back repeatedly or completely drops and does not return. This only happens on 4G. When I go into network settings and change network mode to 3G it works fine and I get a constant signal all the time.
I have been using Fulmics ROM and I thought maybe that was the issue. But it wasn't.
I tried 3 different sims from three different carriers (Three, EE, O2) on several stock firmwares. (20N, 21C, 30A, 30F).
Each scenario is the same; network drops when phone is on 4G network mode, but its fine on 3G mode.
However, I have noticed that if I leave Wifi OFF allowing 4G data to connect first, then its fine. I can even turn Wifi ON again and the network is stable. I can even turn Wifi and Data OFF and the network is still stable.
But, if I toggle aeroplane mode, where Wifi connects first or where Wifi and Data is turned OFF; I am back to the network dropping.
Also, I live in London UK so there should not be any signal issues. Can anyone tell me why this is happening. I doubt it's software issue as I've tried several firmwares.
Any help is appreciated.

Mate I'm afraid there is a high possibility it's the Fulmics ROM.. I'm still trying to read up on the issue myslef, there's a ton of reports in the Fulmics thread and around.

I'm using an UK bought LG G3 as well (from Three) and started experiencing similiar issues after I flashed Fulmics. Even tried rolling back to 4.4.2 using a .tot file but didn't really help me.
Still scouring all around trying to find how to fix the issue..

engmia said:
Mate I'm afraid there is a high possibility it's the Fulmics ROM.. I'm still trying to read up on the issue myslef, there's a ton of reports in the Fulmics thread and around.

I'm using an UK bought LG G3 as well (from Three) and started experiencing similiar issues after I flashed Fulmics. Even tried rolling back to 4.4.2 using a .tot file but didn't really help me.
Still scouring all around trying to find how to fix the issue..
Click to expand...
Click to collapse
Hmmm looking back now this issue did start when I first installed fulmics 3.5. But shouldn't everything revert back to stock when you reinstall stock firmware.

thufz9585 said:
Hmmm looking back now this issue did start when I first installed fulmics 3.5. But shouldn't everything revert back to stock when you reinstall stock firmware.
Click to expand...
Click to collapse
That's what I thought but I guess it's a little bit more tricky.
Anyways I think I managed to restore some kind of stability in the signal, still unsure about the process though. Seems that different stuff are working for different people. In a few days I hope to have some information to give you how to fix it.
In the meantime try checking the Fulmics thread for ideas and suggestions (that's where I start off from).

engmia said:
That's what I thought but I guess it's a little bit more tricky.
Anyways I think I managed to restore some kind of stability in the signal, still unsure about the process though. Seems that different stuff are working for different people. In a few days I hope to have some information to give you how to fix it.
In the meantime try checking the Fulmics thread for ideas and suggestions (that's where I start off from).
Click to expand...
Click to collapse
Yeah let me know when you find a fix. Really appreciate the help.
One thing that is sort of a temporary fix for me, works on Three, EE and O2 (only ones i tried), is connecting Data first when on 4G mode.
So if I toggle airplane mode and if Wifi connects first then the network drops or keeps refreshing.
But, if I leave Wifi OFF and Data establishes a connection; the network is stable and I can then turn Wifi On again and the network will remain stable.
I just have to make sure the network does not lose connection (i.e. tunnel or airplane mode), and if it does ensure Data connects first.
Also, another thing. After I reinstalled Fulmic 5.3 it seems 4G mode is sort of stable. As in when on 4G mode instead of dropping the network it connects via 3G automatically. But this only happens with Three.

thufz9585 said:
Yeah let me know when you find a fix. Really appreciate the help.
One thing that is sort of a temporary fix for me, works on Three, EE and O2 (only ones i tried), is connecting Data first when on 4G mode.
So if I toggle airplane mode and if Wifi connects first then the network drops or keeps refreshing.
But, if I leave Wifi OFF and Data establishes a connection; the network is stable and I can then turn Wifi On again and the network will remain stable.
I just have to make sure the network does not lose connection (i.e. tunnel or airplane mode), and if it does ensure Data connects first.
Click to expand...
Click to collapse
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
thufz9585 said:
Also, another thing. After I reinstalled Fulmic 5.3 it seems 4G mode is sort of stable. As in when on 4G mode instead of dropping the network it connects via 3G automatically. But this only happens with Three.
Click to expand...
Click to collapse
I changed my carrier and got an automatic SMS with configuration for my phone and instructions to save it. I should've known something was fishy when I recieved the "congratulations for setting up" message even before I recieved the actual settings. Anyways 4G was running fine on my new carrier with 32 mbps speed which is okay, much better compared to the same carrier 3G network, however I only had 3 bars of connection so I gussed what the heck, I should save that configuration after all, it might make things better. What a bloody mistake. I lost 4G connectivity and my phone refused to connect to the 4G network, only 3G (just as you describe).
What worked for me in this scenario was wiping the cache and dalvik (not really sure this step is even necessary to be honest, but I was headed for a full rom re-wipe anyway and decided to try with this first), going into the hidden menu and choosing LTE only connectivity (Fulmics Tweaks -> Hidden Menu [or the hidden code for the phone app if you decided to stay on stock, which I dont have] -> Modem Protocol -> RAT Selection -> LTE only. At this step my phone got to the usual 3 to 4 bars of connectiviy but was displaying "Emergency mode only" and no data at all. I proceeded to Settings -> Networks -> More -> Mobile Networks -> Access point names -> Reset to default from the menu. If network mode doesn't change back to GSM/WCDMA/LTE auto automatically, change it back manually. At this point I had restored back my 4G connection and everything is working normally (30-32 mbps connection stationary in my house through a wifi hotspot next to my laptop).
Good luck, I would follow the steps as described just in case. I tried many reflashes before that should've worked but didn't for me. However different things work for different people, hope this works for you and please report back

engmia said:
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
Click to expand...
Click to collapse
I'd like to thank you so much for this information! I was having signal drop issue after installing Fulmics ROM. Tried to flash stock ROM but no success. After doing the downgrade via LGUP method to LP my phone is getting full signal again (at least I didn't notice any drop until now).
Thank you!

waltertakashi said:
I'd like to thank you so much for this information! I was having signal drop issue after installing Fulmics ROM. Tried to flash stock ROM but no success. After doing the downgrade via LGUP method to LP my phone is getting full signal again (at least I didn't notice any drop until now).
Thank you!
Click to expand...
Click to collapse
Glad I could be of help!

engmia said:
Okay here is what worked for me - open this guide and download the Three specifiic Lollipop and Marshmallow .kdz files.
Flash the stock Marshmallow firmware first using the LG Flash Tool method. Your phone probably won't automatically get recognized since you're running Fulmics now so you'll need to change the COM port as described in post #
After that downgrade to stock Lollipop using the LGUP method. Personally I downloaded more updated (I think, not sure) files from here.
Then I proceeded to re-root and clean install Fulmics 5.1 and the 5.2 and 5.3 OTA updates from recovery. Booted and network works without drops now with 4G connectivity.
Click to expand...
Click to collapse
Sorry for the late reply.
I followed your instructions and unfortunately it didn't work. :crying:
I first tried with the D85520f you provided and then with an updated D85521C firmware. But nothing worked.
The temporary fix, which I found works, is to ensure 4G mobile data establishes a connection first before Wifi (turn Wifi OFF then ON after data established). Then there is no signal drop until I go through a tunnel or phone restarts (signal drops completely), which means again i have to ensure 4G mobile data establishes a connection before Wifi or else it'll go back to the constant signal dropping.
Guess I'll just stick with 3G at all times. I've spent too much time trying to correct this than actually finding enjoyment in using the phone.
Anyway really appreciate the time and effort you took to help with this annoying situation. :good::good::good:

thufz9585 said:
Sorry for the late reply.
I followed your instructions and unfortunately it didn't work. :crying:
I first tried with the D85520f you provided and then with an updated D85521C firmware. But nothing worked.
The temporary fix, which I found works, is to ensure 4G mobile data establishes a connection first before Wifi (turn Wifi OFF then ON after data established). Then there is no signal drop until I go through a tunnel or phone restarts (signal drops completely), which means again i have to ensure 4G mobile data establishes a connection before Wifi or else it'll go back to the constant signal dropping.
Guess I'll just stick with 3G at all times. I've spent too much time trying to correct this than actually finding enjoyment in using the phone.
Anyway really appreciate the time and effort you took to help with this annoying situation. :good::good::good:
Click to expand...
Click to collapse
Modem 21C should be your answer! Please try with that.

Is anyone still out there
engmia said:
Modem 21C should be your answer! Please try with that.
Click to expand...
Click to collapse
I flashed dummies and get dropped 4g data like this.
I have tot back to stock and didn't help... not Kdz
Haven't downgraded yet to LP yet.
On turborom now.
Can I just flash this modem? Have a link to the 21c modem?
Flash in twrp or send via LG flash?

Weird Issue with MI MAX - Constant Network disconnects. Please help!

Hello
I will try to be simpler as i can
I have a MI MAX Prime (4GB/128)
Everything was ok and working right until MIUI 8.2.3.0 OTA arrived.
After update my phone started to experience Network disconnects and reconnects, "NO SIM Card, NO NETWORK, VIRGIN 4G", This happens at random periods but more often when i wake up phone from idle.
Nobody on Xiaomi Forums helped me, not even developers, Phone carrier told me to change sim card but problem persisted.
3 sympthoms.
1. After upgrading to 8.2.3.0 i can't search for networks manually. (http://attach.en.miui.com/forum/201705/09/033557amdkj2j33bkmyybm.jpg)
2. I use a MVNO which says i must use Roaming even locally, but this NEVER worked even if activated (http://attach.en.miui.com/forum/201705/09/233925hg9b3p55hm3pcpk9.png.thumb.jpg)
(http://attach.en.miui.com/forum/201705/09/233923kydk07ysor4rt0cz.png.thumb.jpg)
3. I noticed this weird pattern while charging (http://i.imgur.com/SPtvuqY.png)
I have done a factory reset and a rom flash via EDL, but problem remains.
I really don't know what to do now
Thanks in advance for your assistance

Well I am on the 8.2.5 Mi Max (not prime) & you can choose network manually by:
Settings - Sim card and mobile networks - tap on the preferred sim card - mobile networks & switch off the chose automatically and select preferred one.
You have to describe beter what is happening with your network connection. Does it gets blocked or disconnects completely (aka ril restarts) also does switch on/of air-plane mode resolves it?

Zola III said:
Well I am on the 8.2.5 Mi Max (not prime) & you can choose network manually by:
Settings - Sim card and mobile networks - tap on the preferred sim card - mobile networks & switch off the chose automatically and select preferred one.
You have to describe beter what is happening with your network connection. Does it gets blocked or disconnects completely (aka ril restarts) also does switch on/of air-plane mode resolves it?
Click to expand...
Click to collapse
Yeah, thing is i can't choose a network manually everytime it gives this
http://i.imgur.com/7yw4a6w.jpg
In half a second Network disconnects and reconnects,
first "NO SIM Card"
Then "NO NETWORK"
Then "VIRGIN 4G",
It disconnects and reconnects every time.
Specially when unlocking the phone
Notice there is not airplane mode activated
http://attach.en.miui.com/forum/201705/09/234018hpbcqbrqmdmpayam.png.thumb.jpg
http://attach.en.miui.com/forum/201705/09/233926a0hmlmd0ltjlkdl0.png.thumb.jpg

It works hire.
Try rolling back to older versions, 8.1.9.0 is enlisted on official page.
http://en.miui.com/extra.php?mod=rom/download&r=302&mobile=no#458
Obviously somehow RIL is getting stuck & re-initializing (restarting). Can you direct me to a MiUI forum url where you failed complain/bug report.

Zola III said:
It works hire.
Try rolling back to older versions, 8.1.9.0 is enlisted on official page.
http://en.miui.com/extra.php?mod=rom/download&r=302&mobile=no#458
Obviously somehow RIL is getting stuck & re-initializing (restarting). Can you direct me to a MiUI forum url where you failed complain/bug report.
Click to expand...
Click to collapse
Thanks, im charging now to rollback via mi flash.
http://en.miui.com/thread-608373-1-1.html
http://en.miui.com/thread-606830-1-1.html
Also i can't find International Roaming, Only "data roaming" just noticed

Yup it's all Radio Interface Layer (RIL) related.

Zola III said:
Yup it's all Radio Interface Layer (RIL) related.
Click to expand...
Click to collapse
It's a physical issue? or just rom?
I can't afford another phone now

DJ_Tomato said:
It's a physical issue? or just rom?
I can't afford another phone now
Click to expand...
Click to collapse
Definitely a software one, simply something didn't fit in (either a RIL or related cellular radio libs) good when you updated so you need to revert to previous one with other RIL and libs. Then you can try again with 8.2.3.0...

Flashed to 8.2.1.0 with miflash via EDL mode.
Problem remains... Seriously WtH?

DJ_Tomato said:
Flashed to 8.2.1.0 with miflash via EDL mode.
Problem remains... Seriously WtH?
Click to expand...
Click to collapse
Assuming that your bootloader is unlocked I suggest you flash exactly the version with which the phone came, I flash ever with any issue via adb-fastboot placing decompress rom files in the same folder in c: with option "flash all".

Zola III said:
It works hire.
Try rolling back to older versions, 8.1.9.0 is enlisted on official page.
http://en.miui.com/extra.php?mod=rom/download&r=302&mobile=no#458
Obviously somehow RIL is getting stuck & re-initializing (restarting). Can you direct me to a MiUI forum url where you failed complain/bug report.
Click to expand...
Click to collapse
SubwayChamp said:
Assuming that your bootloader is unlocked I suggest you flash exactly the version with which the phone came, I flash ever with any issue via adb-fastboot placing decompress rom files in the same folder in c: with option "flash all".
Click to expand...
Click to collapse
Do you know any repo/mirror of older version fastboots?
I could only find 8.2.1.0

DJ_Tomato said:
Do you know any repo/mirror of older version fastboots?
I could only find 8.2.1.0
Click to expand...
Click to collapse
You are doing something wrong. I pointed you out to the 8.1.9.0. For Mi Max Prime Global stable. I don't know where you found 8.2.1.0. at all it's not enlisted on the site not even for a China Stable (that goes up to 8.2.2.0.)...

Zola III said:
You are doing something wrong. I pointed you out to the 8.1.9.0. For Mi Max Prime Global stable. I don't know where you found 8.2.1.0. at all it's not enlisted on the site not even for a China Stable (that goes up to 8.2.2.0.)...
Click to expand...
Click to collapse
But those you mention are only update packages, iirc MIUI said that fastboot flashable roms has to be in tgz format.
http://bigota.d.miui.com/V8.2.1.0.M...DL_20170117.0000.00_6.0_global_93c4b2ee23.tgz
Friend had this in his bookmarks,

DJ_Tomato said:
But those you mention are only update packages, iirc MIUI said that fastboot flashable roms has to be in tgz format.
http://bigota.d.miui.com/V8.2.1.0.M...DL_20170117.0000.00_6.0_global_93c4b2ee23.tgz
Friend had this in his bookmarks,
Click to expand...
Click to collapse
Did you ever bother to read flashing guide?
http://en.miui.com/a-232.html
& you naturally can download direct from a smartphone.

Zola III said:
Did you ever bother to read flashing guide?
http://en.miui.com/a-232.html
& you naturally can download direct from a smartphone.
Click to expand...
Click to collapse
Yes i did, but i can only download the latest version from my cellphone 8.2.30 which gives me bugs
from the website i can only download
http://update.miui.com/updates/v1/fullromdownload.php?d=helium_global&b=F&r=global&n=
Xiaomi Mi Max Prime 64G/128G Latest Global Stable Version Fastboot File Download
which is helium_global_images_V8.2.3.0.MBDMIDL_20170420.0000.00_6.0_global_ece8e97134.tgz
Please wipe all data in Recovery mode if you want to update to a discontinuous ROM version, or downgrade to an older ROM version using MIUI full ROM pack.
I don't have access to recovery mode since i don't have TWRP and my phone is bootloader locked

After downgrading to 8.2.1.0 and rebooting twice the problem has been fixed, it's been 48 hours and there is no more issue
it's really sad that NOBODY at Xiaomi forums/Help desk/ customer support gave a single S#it about it.
If you are going to purchase a Xiaomi phone, think it twice, there is 0 support. Besides XDA.

DJ_Tomato said:
Yeah, thing is i can't choose a network manually everytime it gives this
http://i.imgur.com/7yw4a6w.jpg
In half a second Network disconnects and reconnects,
first "NO SIM Card"
Then "NO NETWORK"
Then "VIRGIN 4G",
It disconnects and reconnects every time.
Specially when unlocking the phone
Notice there is not airplane mode activated
http://attach.en.miui.com/forum/201705/09/234018hpbcqbrqmdmpayam.png.thumb.jpg
http://attach.en.miui.com/forum/201705/09/233926a0hmlmd0ltjlkdl0.png.thumb.jpg
Click to expand...
Click to collapse
You should check your IMEI *#06#
If IMEI is missing:
Open the file imei.qcn using hex editor and looking for value:
Code:
08 8A 96 72 01 42 99 81 05 - Sim 1
08 8A 96 72 01 42 99 81 86 - Sim 2
..............
Base:
http://en.miui.com/thread-245598-1-1.html

I just unlocked bootloader and tried.
Xiaomi.eu rom
Lineage rom,
both of them have this bug, the only way to have a functional rom is with official global stable 8.2.10
Sigh

DJ_Tomato said:
I just unlocked bootloader and tried.
Xiaomi.eu rom
Lineage rom,
both of them have this bug, the only way to have a functional rom is with official global stable 8.2.10
Sigh
Hi i m facing same problem.... have you fixed completely ?? since i have installed various roms and still facing same problem......
your reply would be highly appreciated.
Jean
Click to expand...
Click to collapse

Hi i m facing same problem, sim goes of and on .....
replaced antenna and changed to various roms ...official and non and still get same problem.....
i have also noticed that bluetooth does not connect to my car whilst i can connect with other phones.....
Carrier is GO (country Malta)
anyone with a solution to repair !!?
thanks in advance

Pro Rom (7.12.14) Connected, No İnternet (Wifi Problem)

Hi everyone;
I unlocked my device and firstly I installed LOS 14.1, secondly Mokee ROM, wifi connected but there is no internet, I tried 1 kernel and still nothing.
After all of this, I installed MİUİ Pro ROM 7.12.14 , I tried to connect wifi , still same problem, wifi connected but there is no internet .
I modified static IP but still nothing.
How can I fix this wifi issue ? Pls I need help.
(Note : I tried two different working wifi point, there is a same problem )

EnesTRKC said:
Hi everyone;
I unlocked my device and firstly I installed LOS 14.1, secondly Mokee ROM, wifi connected but there is no internet, I tried 1 kernel and still nothing.
After all of this, I installed MİUİ Pro ROM 7.12.14 , I tried to connect wifi , still same problem, wifi connected but there is no internet .
I modified static IP but still nothing.
How can I fix this wifi issue ? Pls I need help.
(Note : I tried two different working wifi point, there is a same problem )
Click to expand...
Click to collapse
Have you tried flashing the firmware?

dgrasley said:
Have you tried flashing the firmware?
Click to expand...
Click to collapse
No I didn't , which firmware is ? Can you give me a Link ?

EnesTRKC said:
Hi everyone;
I unlocked my device and firstly I installed LOS 14.1, secondly Mokee ROM, wifi connected but there is no internet, I tried 1 kernel and still nothing.
After all of this, I installed MİUİ Pro ROM 7.12.14 , I tried to connect wifi , still same problem, wifi connected but there is no internet .
I modified static IP but still nothing.
How can I fix this wifi issue ? Pls I need help.
(Note : I tried two different working wifi point, there is a same problem )
Click to expand...
Click to collapse
EnesTRKC said:
No I didn't , which firmware is ? Can you give me a Link ?
Click to expand...
Click to collapse
https://github.com/fjtrujy/capricornCNFirmware/releases

I just flash, but didn't work. Same wifi problem .
İf I install pro rom 7.11.16 and firmware, may be works ? Or , Am I need go back stable ?

EnesTRKC said:
I just flash, but didn't work. Same wifi problem .
İf I install pro rom 7.11.16 and firmware, may be works ? Or , Am I need go back stable ?
Click to expand...
Click to collapse
Personally, I would flash in this order:
- latest LOS 14.1
- firmware
- gapps
Then wipe cache and reboot.
I assume you're also using the latest twrp?

dgrasley said:
Personally, I would flash in this order:
- latest LOS 14.1
- firmware
- gapps
Then wipe cache and reboot.
I assume you're also using the latest twrp?
Click to expand...
Click to collapse
I have , Twrp 3.2.1, I will use this order , and I will write here, thnx u so much .

I installed pro rom 7.11.16 and firmware. I did your said , but wifi still connected, no internet . How can I find solution ? Anyone know about it ?
I wanna add something . Before, I unlocked device mac address start with f4, after rom stars f5 .

EnesTRKC said:
I installed pro rom 7.11.16 and firmware. I did your said , but wifi still connected, no internet . How can I find solution ? Anyone know about it ?
I wanna add something . Before, I unlocked device mac address start with f4, after rom stars f5 .
Click to expand...
Click to collapse
I'm not even sure how thats possible just by unlocking...

dgrasley said:
I'm not even sure how thats possible just by unlocking...
Click to expand...
Click to collapse
I just return global stable 8.5.4 still same , I have no move ...

EnesTRKC said:
I just return global stable 8.5.4 still same , I have no move ...
Click to expand...
Click to collapse
I'm not sure what else to suggest.
Sorry man. :/

dgrasley said:
I'm not sure what else to suggest.
Sorry man. :/
Click to expand...
Click to collapse
if something come up for this problem, send me a msj pls

EnesTRKC said:
if something come up for this problem, send me a msj pls
Click to expand...
Click to collapse
my problem was a little bit different but it might help you. my wife and i are using mi5s 4/128gb. and we bought them from same website. we couldnt be avle to connect the same wifi in our house. i tried many different custom rom or stock rom but it didn `t solve it. i guess the person who sell the devices , put the same mac adresses to both device. so i figured out the problem with changing the mac adress. Now our devices are connecting any wifi hotspot without a single problem. :good:

shinnizle said:
my problem was a little bit different but it might help you. my wife and i are using mi5s 4/128gb. and we bought them from same website. we couldnt be avle to connect the same wifi in our house. i tried many different custom rom or stock rom but it didn `t solve it. i guess the person who sell the devices , put the same mac adresses to both device. so i figured out the problem with changing the mac adress. Now our devices are connecting any wifi hotspot without a single problem. :good:
Click to expand...
Click to collapse
My modem files erased when I did root my phone. Modem files need to write again. This is only solution . I will try to write modem files. After that I let you know.
TWRP backup so important, this case. Modem and other files must be protect with back up.

EnesTRKC said:
My modem files erased when I did root my phone. Modem files need to write again. This is only solution . I will try to write modem files. After that I let you know.
TWRP backup so important, this case. Modem and other files must be protect with back up.
Click to expand...
Click to collapse
My modem files crushed. This files wrote again and phone back normally.
Back up files need to be archived before flash rom.
I learned my lesson , you guys be careful

volte in zui 3.1.117 deodexed/qpst

Hi, I am using my Z2 with deodexed 3.1.117 and earlier I was using it with stock zui 3.1.117 qpst flashed. The problem mostly occurs when I use the portable Hotspot. After turning off the Hotspot it is still shown as ON in the notifications and when I restart my phone in this condition I loose Volte. Also this problem occurs when I try to restart in case of some other network related error. And once the Volte is gone, there is no way I can get it back like restarting etc. What I need to do is to flash the modem again. I am currently using the 3.1.117 baseband. Someone please share his/her trick to get back Volte...if possible without flashing the modem

Try to start it from the"Start"
Flash qpst rom of zui 2.5.104 from your pc
Check again the portable hotspot and Volte, they'll start to work again.
Unlock the bootloaders, install latest twrp, then head towards installing any new rom you want !
( I Have followed the same trick and it worked for me pretty well !)

prajwal998 said:
Try to start it from the"Start"
Flash qpst rom of zui 2.5.104 from your pc
Check again the portable hotspot and Volte, they'll start to work again.
Unlock the bootloaders, install latest twrp, then head towards installing any new rom you want !
( I Have followed the same trick and it worked for me pretty well !)
Click to expand...
Click to collapse
As I have mentioned in my post, Volte comes back after reflashing the baseband. And this problem persists from the day I received the phone from China. And it came with marshmallow rom. All I want is some trick like in some phones when we add new APN the Volte automatically gets restored. So, what I want is some trick someone know for a problem like I am facing. Thanks.

Question No Network Service after latest software update

Hello! I updated my phone to MIUI Global 13.0.7 Stable (SKHINXM) and suddenly my phone has no service. The sim card is fine and working on other phones like it was before the update. Really unable to fix this issue. If it helps, in the testing window the 'Mobile Radio Power' is toggled off and however many times I try to switch it on, it automatically switches off. Please help! Thanks

rishab298 said:
Hello! I updated my phone to MIUI Global 13.0.7 Stable (SKHINXM) and suddenly my phone has no service. The sim card is fine and working on other phones like it was before the update. Really unable to fix this issue. If it helps, in the testing window the 'Mobile Radio Power' is toggled off and however many times I try to switch it on, it automatically switches off. Please help! Thanks
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13.0.7 Stable (SKHINXM) is a stable beta.
Try to reset the phone or if your bootloader is unlocked flash with this tool
https://forum.xda-developers.com/t/flash-tool-guide-use-xiaomi-flash-tool.4262425/

Will flashing the file lead to me losing all data? Apologies if it's a stupid question

rishab298 said:
Will flashing the file lead to me losing all data? Apologies if it's a stupid question
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yeap ,use micloud, or Mi phone assistant or others to backup.(wifi).

NOSS8 said:
yeap ,use micloud, or Mi phone assistant or others to backup.(wifi).
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Okay thank you! Will try it in a few days time once I am able to give it the time needed.

It is happening to me too, I'm on stock 13.0.4 SKHMIXM, bootloader locked, it happened in 13.0.3 too. Sometimes, I see I have no services, no data, no GPS. But WiFi works great, so if I'm in house I don't always see it, but it means I cannot receive call!!!
I tried to enable/disable sim/data/location/airplane/etc nothing works.
Only way to re-make it works is to reboot the phone, and after 2 or 3 weeks it will happen again, this is the price to pay to have cheap chinese phone...

Try booting into Android with Safe Mode. (and disable Airplane Mode if enabled)
Power + Volume Up > Safe Mode
Or try this:
Settings > Updater > Tap on the "13" several times, this will enable additional Updater-features. Download the latest package and install it.
My guess is that your update may have been corrupt.
Other than that.. Factory Reset or connecting phone to PC and flashing ROM using Fastboot & Mi Flash or Terminal.
I've 13.0.7 and everything's flawless.

So the Xiaomi service center told me that it is possibly a motherboard issue. How can a software update suddenly awaken a hardware issue?

So I had not unlocked my bootloader via my Mi account and it needs mobile data for the same and hence I am unable to flash it since my network is still unavailable even after a factory reset. Any other way I can flash my phone with an older version of MIUI or I will have to submit my phone to the service center?

rishab298 said:
So I had not unlocked my bootloader via my Mi account and it needs mobile data for the same and hence I am unable to flash it since my network is still unavailable even after a factory reset. Any other way I can flash my phone with an older version of MIUI or I will have to submit my phone to the service center?
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I used Google phone to unlock the bootloader you don't need cellular service just change the account phone number to Google phone one to receive the code work ed for me

jefffrom said:
I used Google phone to unlock the bootloader you don't need cellular service just change the account phone number to Google phone one to receive the code work ed for me
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Could you elaborate the whole process? I do not know how to do this. Thanks

Same issue i am facing after MIUI updation for 13.0.3.0 SJCINXM ... suddenly all networks are vanished ... if i do manual search for networks then i get a message 'Couldn't search for mobile networks' . Voice call is only possible if wifi is enabled.. This is really a horrible experience and i am unable to find out a way to get rid of this situation.. I am using Redmi 9 Prime handset .. Before this update everything was surperb and flawless.

It is still happening with the latest Android 13 and MIUI14, it's frustrating... sometimes when the phone switch wifi/lte/wifi/lte/etc when you go outside, the modem crashes, it internally bootloop and the phone becomes warm and can lose 25% battery in like 15 minutes. Only way is to reboot the phone.

I had a similar problem. Were you able to solve it?