Database Develop

[Q] Xperia Z 6603, 10.3.1.A.0.244/ 10.3.1.A.2.67 - mobile data problem

Hello All,
I am afraid this not is going to be a short and easy story... I will try to be short
After the Stock update to 4.4.2 i got finally fed up with the fact that the long awaited KitKat drains battery like a power addict and decided to go back to stock 4.2.2 - which, for me, solves two problems - in this version the Bluetooth connectivity in my car works properly and the battery is used more 'soberly' as well as that I can easily root it and clear all the bloatware.
I found several stock versions of 4.2.2 - e.g. C6603_10.3.1.A.0.244_Generic NCB.ftf, C6603_10.3.1.A.0.244_CE.ftf, C6603_10.3.1.A.2.67_CE.ftf
After flashing them with the latest flashtool everything seems fine - battery, bluetooth,wifi etc. BUT the mobile data has the following problem: the phone connects to 4G, 3G and GPRS, but apart from Youtube none of the applications is able to use the Internet connection from the mobile operator. This to me seems like a problem with DNS resolution but I do not have any firewalls etc. installed or activated.
It may be worth mentioning that when Chrome tries to connect to a web address (e.g. xyz) for an instant there is a message on the screen "Redirecting you to xyz web address", maybe this is the place where it goes wrong? Needles to say that the connection to the specified website is not possible because "Chrome could not find the xyz page"... (this does not happen on wifi connection).
I would be very grateful if U could suggest a way out !

Have you tried downloading the Internet setting ?
at setting -> xperia -> Internet setting.

Orangewanted said:
Have you tried downloading the Internet setting ?
at setting -> xperia -> Internet setting.
Click to expand...
Click to collapse
Hi,
I reloaded the Internet settings from my operator several times, also changed to another sim. What is really puzzling is that Youtube has no problem with connecting. There is something funny going on with the DNS service I suppose....
Any thoughts ?
Thx

barbacan said:
Hello All,
I am afraid this not is going to be a short and easy story... I will try to be short
After the Stock update to 4.4.2 i got finally fed up with the fact that the long awaited KitKat drains battery like a power addict and decided to go back to stock 4.2.2 - which, for me, solves two problems - in this version the Bluetooth connectivity in my car works properly and the battery is used more 'soberly' as well as that I can easily root it and clear all the bloatware.
I found several stock versions of 4.2.2 - e.g. C6603_10.3.1.A.0.244_Generic NCB.ftf, C6603_10.3.1.A.0.244_CE.ftf, C6603_10.3.1.A.2.67_CE.ftf
After flashing them with the latest flashtool everything seems fine - battery, bluetooth,wifi etc. BUT the mobile data has the following problem: the phone connects to 4G, 3G and GPRS, but apart from Youtube none of the applications is able to use the Internet connection from the mobile operator. This to me seems like a problem with DNS resolution but I do not have any firewalls etc. installed or activated.
It may be worth mentioning that when Chrome tries to connect to a web address (e.g. xyz) for an instant there is a message on the screen "Redirecting you to xyz web address", maybe this is the place where it goes wrong? Needles to say that the connection to the specified website is not possible because "Chrome could not find the xyz page"... (this does not happen on wifi connection).
I would be very grateful if U could suggest a way out !
Click to expand...
Click to collapse
manually flash 4.3
check whether it rectifies issues
after that manually flash 4.4.2 without data wipe

androidtweaker1 said:
manually flash 4.3
check whether it rectifies issues
after that manually flash 4.4.2 without data wipe
Click to expand...
Click to collapse
Hello - thanks for this attempt, but unfortunately no luck with it. Here is what I did (please check if I understood you correclty):
1) downloaded - C6603_10.4.1.B.0.101_CE.ftf (4.3)
2) flashed 4.3.(above) with Flashtool (wiping all)
3) restarted - mobile data could be accessed by Chrome and other apps
4) flashed 4.2.2 ver 10.3.1.A.0.244 and then 10.3.1.A.2.67 with the data wipe disabled,
Result - again in 4.2.2 the mobile data is not available to apps other than Youtube ...
Any more thoughts on this?
Thanks again !

barbacan said:
Hello - thanks for this attempt, but unfortunately no luck with it. Here is what I did (please check if I understood you correclty):
1) downloaded - C6603_10.4.1.B.0.101_CE.ftf (4.3)
2) flashed 4.3.(above) with Flashtool (wiping all)
3) restarted - mobile data could be accessed by Chrome and other apps
4) flashed 4.2.2 ver 10.3.1.A.0.244 and then 10.3.1.A.2.67 with the data wipe disabled,
Result - again in 4.2.2 the mobile data is not available to apps other than Youtube ...
Any more thoughts on this?
Thanks again !
Click to expand...
Click to collapse
Another solution will be root the 4.2.2 using easyroot
flash prerooted 4.4.2
download no frills cpu from playstore and under-clock the processor a bit it will greatly improve battery life.I am doing the same :good:

androidtweaker1 said:
Another solution will be root the 4.2.2 using easyroot
flash prerooted 4.4.2
download no frills cpu from playstore and under-clock the processor a bit it will greatly improve battery life.I am doing the same :good:
Click to expand...
Click to collapse
OK - So I see where we have a misunderstanding ... I wanted to go back to 4.2.2. which worked fine for me for the small exception of the mobile data transmission but not go up to 4.4.2.
I am looking for a solution to make the 4.2.2. work with data transmission.
Could you give this a thought ? I would appreciate it a lot!
Regards!

barbacan said:
OK - So I see where we have a misunderstanding ... I wanted to go back to 4.2.2. which worked fine for me for the small exception of the mobile data transmission but not go up to 4.4.2.
I am looking for a solution to make the 4.2.2. work with data transmission.
Could you give this a thought ? I would appreciate it a lot!
Regards!
Click to expand...
Click to collapse
I gave 4.4.2 solution because the data issue is sufficing in 4.2.2 repeatedly
and from what i had read the only issue you had with 4.4.2 was battery drain so gave you a solution for 4.4.2 :silly:

androidtweaker1 said:
I gave 4.4.2 solution because the data issue is sufficing in 4.2.2 repeatedly
and from what i had read the only issue you had with 4.4.2 was battery drain so gave you a solution for 4.4.2 :silly:
Click to expand...
Click to collapse
Your help is very much appreciated!
The reason I keep trying with 4.2.2 is that I am also struggling with the bluetooth issue: on anything above 4.2.2. - simply does not connect to my car's buletooth handsfree....
Thanks anyway. I need to decide whether I have the bluetooth and no mobile data or mobile data and no bluetooth, Seems like Sony is not too generous ...

barbacan said:
Your help is very much appreciated!
The reason I keep trying with 4.2.2 is that I am also struggling with the bluetooth issue: on anything above 4.2.2. - simply does not connect to my car's buletooth handsfree....
Thanks anyway. I need to decide whether I have the bluetooth and no mobile data or mobile data and no bluetooth, Seems like Sony is not too generous ...
Click to expand...
Click to collapse
Have u given 4.3 a try?
Edit ignore this

androidtweaker1 said:
Have u given 4.3 a try?
Click to expand...
Click to collapse
Yes:
4.3 - mobile data is ok, bluetooth not compatible with my car ... :crying:
When I tried to flash 4.2.2. over 4.3 without wiping data I got bootloped...
Thanks for trying to help !
Do you think that there is a way to use the bluetooth functionality from 4.2.2 on 4.3? How could it be done?

barbacan said:
Yes:
4.3 - mobile data is ok, bluetooth not compatible with my car ... :crying:
When I tried to flash 4.2.2. over 4.3 without wiping data I got bootloped...
Thanks for trying to help !
Do you think that there is a way to use the bluetooth functionality from 4.2.2 on 4.3? How could it be done?
Click to expand...
Click to collapse
Maybe you can try flashing the 4.2.2 via flashtool (wipe everything) to solve this problem, please give it try.
Actually, 4.3 works without bugs so far and have no thoughts about what causes this problem.

Orangewanted said:
Maybe you can try flashing the 4.2.2 via flashtool (wipe everything) to solve this problem, please give it try.
Actually, 4.3 works without bugs so far and have no thoughts about what causes this problem.
Click to expand...
Click to collapse
Hello - thanks! I tried complete wipe/flash of 4.2.2 and that's where my problem is - 4.2.2 data transmission in mobile is lost whereas on 4.3 or above my bluetooth does not communicate with my car's handsfree (this issue is being reported by many users after upgrade to 4.3.)
So I am stuck ... for the moment I am staying on 4.3 and getting really tired of this whole Xperia stuff

barbacan said:
Hello - thanks! I tried complete wipe/flash of 4.2.2 and that's where my problem is - 4.2.2 data transmission in mobile is lost whereas on 4.3 or above my bluetooth does not communicate with my car's handsfree (this issue is being reported by many users after upgrade to 4.3.)
So I am stuck ... for the moment I am staying on 4.3 and getting really tired of this whole Xperia stuff
Click to expand...
Click to collapse
Hello barbacan! I've got exactly the same situation here. I was on 4.2.2 becouse it was latest firmware that worked with my car (Opel Insignia DVD800). A week ago I had motherboard failure, so I send my phone for a replacement. I received a brand new one with 4.4.2 installed which of course didn't communicate with my car. So I flashed exactly the same 4.2.2 file which I use with previous phone, but this time data transmission did not work. When I upgraded to 4.4.2 transmission was back again. I think Sony have changed something in newer phones hardware and they are not compatible with older firmwares. I've been serching for a few days, but couldn't find any solution...

Ok, I think I have found the solution. Changing APN settings from default IPv6 to IPv4 resolved the issue for me. Just change it in settings, save, reboot the phone and data transfer works again!

mazurczakm said:
Ok, I think I have found the solution. Changing APN settings from default IPv6 to IPv4 resolved the issue for me. Just change it in settings, save, reboot the phone and data transfer works again!
Click to expand...
Click to collapse
Hello !
Thanks for the suggestion - I will surely give it a try. Your solution sounds very promising !

SUCCESS !!!
mazurczakm said:
Ok, I think I have found the solution. Changing APN settings from default IPv6 to IPv4 resolved the issue for me. Just change it in settings, save, reboot the phone and data transfer works again!
Click to expand...
Click to collapse
THANKS A LOT!
This is the solution.
I was suspecting something to do with DNS services but did not realize that Adroid 4.2.2. does not have IPV6 support. Now that I changed my APN from "InternetIPV6" to plain "Internet" the phone works like a charm. I will not be tempted to upgrade at any price

barbacan said:
THANKS A LOT!
This is the solution.
I was suspecting something to do with DNS services but did not realize that Adroid 4.2.2. does not have IPV6 support. Now that I changed my APN from "InternetIPV6" to plain "Internet" the phone works like a charm. I will not be tempted to upgrade at any price
Click to expand...
Click to collapse
I'm very glad it works for you also!

[Q] Tethering Problem

Hey guys,
I have a Z1 C903, which doesn't work as a wifi tether nor bluetooth tether. I can turn it on, and other devices can see it, however when trying to connect, the signal drops completely.
If I wait the signal will restart and become full strength, where I will need to manually connect, which proceeds to the signal disappearing again. I've tried unsecure, wpa2, wpa to which I have no luck either. Devices such as laptop will say limited connection, whereas android tablets and phones will refuse to connect and will say "Saved, secured with WPA2" or something else if i change the password method.
I've tried searching for any reports of wifi tethering not working, but the problems seem to be different from my situation.
More details on my device:
It has an unlocked bootloader
Now running Paranoid android
Problem occurred on stock 4.3, nut 4.4 (I assumed it was a glitch on Sony's drivers, and have waited for months now for a patch)
Could a faulty TA do this?
Any ideas?
Am I f***ed?
Cheers

ch33bs said:
Hey guys,
I have a Z1 C903, which doesn't work as a wifi tether nor bluetooth tether. I can turn it on, and other devices can see it, however when trying to connect, the signal drops completely.
If I wait the signal will restart and become full strength, where I will need to manually connect, which proceeds to the signal disappearing again. I've tried unsecure, wpa2, wpa to which I have no luck either. Devices such as laptop will say limited connection, whereas android tablets and phones will refuse to connect and will say "Saved, secured with WPA2" or something else if i change the password method.
I've tried searching for any reports of wifi tethering not working, but the problems seem to be different from my situation.
More details on my device:
It has an unlocked bootloader
Now running Paranoid android
Problem occurred on stock 4.3, nut 4.4 (I assumed it was a glitch on Sony's drivers, and have waited for months now for a patch)
Could a faulty TA do this?
Any ideas?
Am I f***ed?
Cheers
Click to expand...
Click to collapse
Flash your phone by flash tools including wipe apps log and cache and system
It should solve your problem
And of course first re-lock your BL and flash to stock Rom
Sent from my C6903 using Tapatalk

Sorry about late reply, I am out in urban areas without internet connection. I'll try doing this tonight.
Am I right in assuming all Z1 CM ROMs have this problem, if I must install a stock-based ROM?
SaeedFazlollahzadeh said:
Flash your phone by flash tools including wipe apps log and cache and system
It should solve your problem
And of course first re-lock your BL and flash to stock Rom
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse

ch33bs said:
Sorry about late reply, I am out in urban areas without internet connection. I'll try doing this tonight.
Am I right in assuming all Z1 CM ROMs have this problem, if I must install a stock-based ROM?
Click to expand...
Click to collapse
Oh, sorry I forgot to tell you
You should use stock rom
http://forum.xda-developers.com/showthread.php?t=2469191&page=145
Go here and fun your phone model and download the version and region you want
Sent from my C6903 using Tapatalk

You can try to change the name of your phone (Network SSID) to a simpler form instead of default.

I got it working
I got it working thanks to your suggestion, Saeed.
I flashed the stock ftf from the mega thread and that restored my tethering capabilities. I then proceeded to reinstall the ParanoidRom and now the tethering works as well.
I'm not sure what happened, but I'd assume something went wrong when upgrading to 4.3 and the problem stayed when I then upgraded again to 4.4 and then to paranoid.
Thanks

[HELP] Wi-Fi problem after mm update- SM_9208

My note 5 is the duos version, imported in Romania from Taiwan (SM_9208) After updating to Marshmallow yesterday, everything worked fine except for on thing: it doesn't find my Wi-Fi network from home anymore and the only way I can connect to it is by going to,, add network " and manually inserting the ssid and PASSWORD because it doesn't appear on the available networks list. Thst means that every time I turn my wireless off and then on, I have to repeat that process.
I haven't had the chance to try any other WiFi network, but I tried with other phones to connect to the network and they found it and connected to it without any problem. Furthermore, any third party app like WiFi analyser is able to see the network.
Do you guys have any idea how I could possibly solve this?
Thank you and have a wonderful day!

Try to backup your phone and then do a factory reset.

I factory reset after update OTA and everything work perfect.

uhm... does n9208 has update for MM already? if you have links kindly share tnx in advance

I tried doing the factory reset and it still has that problem.
And I did receive the update yesterday through OTA.
Other suggestions? Thank you, guys!

flavius222 said:
I tried doing the factory reset and it still has that problem.
And I did receive the update yesterday through OTA.
Other suggestions? Thank you, guys!
Click to expand...
Click to collapse
First, try clearing the cache again. If it still does not work, the update may have downloaded improperly so some file are corrupted. It will continue to use the same corrupted files even if you reset. Have your tried flashing the stock Taiwan Rom using Odin?

//LATER EDIT: I finally made it work by simply changing the wireless network's name. For some reason, my phone wouldn't find the network with its default name.

Same Firmwareupdate since Weeks

Hi,
since Weeks i am having an annoying problem:
the Same update is coming, and i tried everything:
Install the Update approx 20 times
Check in Hicare -no update
Check in Hisuite - NO update
Email Huwai - No answer
Hard Restet (!) - Same
I have read that sometimes a newer update pops up, or with hisuite theres a new update, but always the same.
Any ideas?

I didn´t have the same problem but for me it was that I never got the 9.1 update.
Changing to another operators SIM-card triggered the update, and then after updating to the most recent version I switched back to my default sim.
Maybe it´s the solution to your problem as well, might be worth a shot at least.

This i tried also when the 9.1 update didnt come. Did not work for me. But i will give it again a try

Did not work, also via erecovery (official) , get an error

I had that problem when I did update via moded HiSuite from 9.0.0.286 to 9.1.0.325... I downgraded again to 2.0.0.286 and then I updated first to 9.1.0.311 (no problem), and after that to 9.1.0.328
So try if you want, but I'm not responsible if something goes wrong...
Link for procedure...
https://forum.xda-developers.com/to...-finder-team-mt-t3469146/page144#post79988916

Can someone help me, im getting crazy.
I´ve tried it on 3 different pc´s, at home, in my company... Always the same.
Changed hosts file
installed hisuite and copied the modified files
opened ff on my p20 pro, approved .328 update
does not work, error.
Am i doing something wrong still?
I can download the update in ff, is there a risk to install it this way?

MeisterGigi said:
Can someone help me, im getting crazy.
I´ve tried it on 3 different pc´s, at home, in my company... Always the same.
Changed hosts file
installed hisuite and copied the modified files
opened ff on my p20 pro, approved .328 update
does not work, error.
Am i doing something wrong still?
I can download the update in ff, is there a risk to install it this way?
Click to expand...
Click to collapse
Have you changed the DNS in your wifi connection? Check out the box for IPV6, disconnect the internet, connect again and make sure that your mobile and Laptop are connected with the same network, you just need to change the DNS in your host file, nothing more, good luck.

Aaaah, i finally made it, wlan router with the dns settings did the trick, this was not mentioned in the manual i think?
Happy now
Thanks

Cant Turned on WIFI/BT, Already Flashed for BT still not working

Hi , its been a year since i bought xiaomi mi 9-global rom(128GB) and all work properly.
if im not mistaken the first rom when i bought is MIUI 10 , then the last time i update if im not mistaken is around september in MIUI 12.02 for the latest security patch.
Suddenly problem occurs recently maybe around a week. where my Wifi & Bluetooth disconnected by the system and cant be turned on but it fixed it self as i restart and now its never fixed.
I already some of fixed below :
- Restart devices
- Wipe all data
- Factory reset
- Try to flash the ROM from official one MIUI 12.02
- Following some tutorials that reset bluetooth and wifi settings
- Try downgrading MIUI version to 11
but still didnt work the Wifi & Bluetooth setting always crash & cant be turned on , try CIE or CIU test found out that the proximity sensor also didn't work.
I also tried some tutorials that do in EDL mode to install persist mode but its not working due to the Authentication it says" i dont have the permission"
Is there anyway i can fixed the Bluetooth & Wifi in this device?? The Mobile Data is still working and other features still working except Proximity Sensor, WIFI, Bluetooth.
Is the only way is to let the xiaomi store fixed it?? this is my only phone so i need it alot and the office store probably going to take long since pandemic.
Please help me Xiaomi Pro's out there :crying:
Edit :
- my xiaomi account already match with the phone the proof is i can unlocked OEM using the xiaomi. But it seems i still dont have permissions to flash EDL.

ohookayy said:
Hi , its been a year since i bought xiaomi mi 9-global rom(128GB) and all work properly.
if im not mistaken the first rom when i bought is MIUI 10 , then the last time i update if im not mistaken is around september in MIUI 12.02 for the latest security patch.
Suddenly problem occurs recently maybe around a week. where my Wifi & Bluetooth disconnected by the system and cant be turned on but it fixed it self as i restart and now its never fixed.
I already some of fixed below :
- Restart devices
- Wipe all data
- Factory reset
- Try to flash the ROM from official one MIUI 12.02
- Following some tutorials that reset bluetooth and wifi settings
- Try downgrading MIUI version to 11
but still didnt work the Wifi & Bluetooth setting always crash & cant be turned on , try CIE or CIU test found out that the proximity sensor also didn't work.
I also tried some tutorials that do in EDL mode to install persist mode but its not working due to the Authentication it says" i dont have the permission"
Is there anyway i can fixed the Bluetooth & Wifi in this device?? The Mobile Data is still working and other features still working except Proximity Sensor, WIFI, Bluetooth.
Is the only way is to let the xiaomi store fixed it?? this is my only phone so i need it alot and the office store probably going to take long since pandemic.
Please help me Xiaomi Pro's out there :crying:
Edit :
- my xiaomi account already match with the phone the proof is i can unlocked OEM using the xiaomi. But it seems i still dont have permissions to flash EDL.
Click to expand...
Click to collapse
I would try to follow flashing method from xiaomi.eu
https://xiaomi.eu/community/threads/miui-12-0-stable-release.56191/

Laptapper said:
I would try to follow flashing method from xiaomi.eu
Click to expand...
Click to collapse
Im a new user so i cant post link above
Click to expand...
Click to collapse
thanks for the answers , is it save to flash using EU ROM? last time when i browsing for fix tutorials i read some forum here about redmi user if im not mistaken that get the phone locked for 30 days after using custom ROM when he tried to revert it back. do you think its save ? mine is global version

ohookayy said:
thanks for the answers , is it save to flash using EU ROM? last time when i browsing for fix tutorials i read some forum here about redmi user if im not mistaken that get the phone locked for 30 days after using custom ROM when he tried to revert it back. do you think its save ? mine is global version
Click to expand...
Click to collapse
I think it's safe as miui could be.
But be shure to follow step by step and take right rom version. If it's working you can flash original miui or custom roms.

Laptapper said:
I would try to follow flashing method from xiaomi.eu
Click to expand...
Click to collapse
Laptapper said:
I think it's safe as miui could be.
But be shure to follow step by step and take right rom version. If it's working you can flash original miui or custom roms.
Click to expand...
Click to collapse
Thanks for the suggestion, after i tried to flash to EU ROM i got new MIUI version which 12.04 , in global its 12.02. However the problem still happening or still remain unsolved. The bluetooth & wifi still cant be turned on, i tried on CIT it also not working and everytime the i try to open wifi & bluetooth settings , the settings always freeze and crash probably because it error. Is there any other solution you can provide?
Thanks

ohookayy said:
Thanks for the suggestion, after i tried to flash to EU ROM i got new MIUI version which 12.04 , in global its 12.02. However the problem still happening or still remain unsolved. The bluetooth & wifi still cant be turned on, i tried on CIT it also not working and everytime the i try to open wifi & bluetooth settings , the settings always freeze and crash probably because it error. Is there any other solution you can provide?
Thanks
Click to expand...
Click to collapse
I think, if you have done a really clean flash with formating data, that it's a hardware problem.

Laptapper said:
I think, if you have done a really clean flash with formatting data, that it's a hardware problem.
Click to expand...
Click to collapse
yes, i did i already follow the instructions & having no error at all for the ROM and other stuff except the WiFi & Bluetooth.
But for me its just really weird, my phone looks still great from outside no bend, dent, or crack it never fall as well.
The problem starts occurring by itself like the system is forcing the Bluetooth & WiFi to off then at some point the WiFi is connected but not transferring any data after restart everything fixed then its not working at all, which when i tried to turn it on it will freeze or the system not responding or off by itself.
btw appreciate your answer, i'm still waiting for other solution if possible :crying:

ohookayy said:
yes, i did i already follow the instructions & having no error at all for the ROM and other stuff except the WiFi & Bluetooth.
But for me its just really weird, my phone looks still great from outside no bend, dent, or crack it never fall as well.
The problem starts occurring by itself like the system is forcing the Bluetooth & WiFi to off then at some point the WiFi is connected but not transferring any data after restart everything fixed then its not working at all, which when i tried to turn it on it will freeze or the system not responding or off by itself.
btw appreciate your answer, i'm still waiting for other solution if possible :crying:
Click to expand...
Click to collapse
Are you shure that you've got a global version. I had nearly the same probs as I've flashed the global on my eu hardware.

Laptapper said:
Are you shure that you've got a global version. I had nearly the same probs as I've flashed the global on my eu hardware.
Click to expand...
Click to collapse
yes, the box says global ROM and the warranty as well and made in china. When i first buy it the box still sealed too but ididnt buy from the mi store.

ohookayy said:
yes, the box says global ROM and the warranty as well and made in china. When i first buy it the box still sealed too but ididnt buy from the mi store.
Click to expand...
Click to collapse
In my personal opinion there're 2 possibilities
Damaged hardware
Or
Modem Partition wrong or damaged
MODEM or RADIO - the phone's radio
Also called baseband, it is responsible for signals and on older devices may control wifi, bluetooth, and GPS (on most newer devices, these are handled by the kernel and ROM). Upgrades are country dependent and may improve or diminish battery performance, network signal strength, and roaming capability. It is also sometimes required to have a minimum Baseband version to use a ROM so that the RIL will play nice with the Baseband.
Modem firmware is a mini-OS for the cellular radio chip which has its own processor. Firmware is a general term, firmware exists for a lot of things on phone. The wireless chip for WiFi, GPS, and Bluetooth often has a firmware as can the GPU core among other things. These firmware files are usually located inside the SYSTEM or VENDOR partition. The modem firmware is special because it has its own separate Baseband Processor (BP) so the firmware is left out of the system image in its own partition.
Modem is not an Android-specific partition. It is tied to the hardware of the phone, but the kernel has a code allowing Android to interact with the hardware. But the baseband processor (BP) - which runs modem and is responsible for all communication through mobile networks e.g. call, SMS and internet - is totally isolated from Application Processor (the one we call CPU) and is not governed by Android kernel; it runs an independent RTOS.
May it helps you for getting a solution....

Laptapper said:
In my personal opinion there're 2 possibilities
Damaged hardware
Or
Modem Partition wrong or damaged
MODEM or RADIO - the phone's radio
Also called baseband, it is responsible for signals and on older devices may control wifi, bluetooth, and GPS (on most newer devices, these are handled by the kernel and ROM). Upgrades are country dependent and may improve or diminish battery performance, network signal strength, and roaming capability. It is also sometimes required to have a minimum Baseband version to use a ROM so that the RIL will play nice with the Baseband.
Modem firmware is a mini-OS for the cellular radio chip which has its own processor. Firmware is a general term, firmware exists for a lot of things on phone. The wireless chip for WiFi, GPS, and Bluetooth often has a firmware as can the GPU core among other things. These firmware files are usually located inside the SYSTEM or VENDOR partition. The modem firmware is special because it has its own separate Baseband Processor (BP) so the firmware is left out of the system image in its own partition.
Modem is not an Android-specific partition. It is tied to the hardware of the phone, but the kernel has a code allowing Android to interact with the hardware. But the baseband processor (BP) - which runs modem and is responsible for all communication through mobile networks e.g. call, SMS and internet - is totally isolated from Application Processor (the one we call CPU) and is not governed by Android kernel; it runs an independent RTOS.
May it helps you for getting a solution....
Click to expand...
Click to collapse
Thanks for the long and detailed explanation . My mobile network & GPS still work properly without any issues.
but idk if the Bluetooth & WiFi chip maybe fried inside
Maybe i just dont have any other option except to fix in mi store.
Once again thanks for the help :fingers-crossed:.