Question Poco F3 Signal issue both MIUI and custom roms

Search This thread

crashpoum99

Senior Member
Aug 3, 2015
62
21
23
Thessaloniki
Xiaomi Poco F3
Hello everybody.
I have an issue with the Poco F3 regarding signal and networking.
After the last update to MIUI 12.5 and later MIUI 13, my phone was having issues making and receiving calls and also using mobile data.
Before those updates, I had no issues whatsoever.
I unlocked my bootloader and decided to try a custom rom, thinking it will solve this issue but nothing has changed.
I have "no service" in areas were many other phones (xiaomi and cheap ones at that etc) have at least 4g. Other times, while I do have service, I can't make or receive calls and even if I can, it's dropping after the first minute or so. Trying to use mobile data is a mess too, working rarely and most of the times I get that exclamation mark and cannot access the internet. It's starting to cause issues at work.
Note, that I use the phone with dual sims from different carriers and the issue is the same. I tried using only a single SIM thinking it might have something to do with dual sims but nothing.
I tried everything, from factory reset, to reseting network settings, airplane mode for 30seconds, custom roms, custom apns etc etc.
The sims work as they should on a poco m3 that I also own, but on the F3 the issue remains.
Now, the issue is much work with android 12, both with MIUI and custom rom (using PixelOS at the moment).
Do you think it is a hardware issue? Should I try an android 11 custom rom and see if the issue is fixed? Is there anything else I should try?
It's driving me crazy and since it's causing work related issues I am thinking of just getting a new phone at this point.
Thanks in advance.
 

Rstment ^m^

Senior Member
Aug 19, 2018
381
121
Xiaomi Poco F3
Hello everybody.
I have an issue with the Poco F3 regarding signal and networking.
After the last update to MIUI 12.5 and later MIUI 13, my phone was having issues making and receiving calls and also using mobile data.
Before those updates, I had no issues whatsoever.
I unlocked my bootloader and decided to try a custom rom, thinking it will solve this issue but nothing has changed.
I have "no service" in areas were many other phones (xiaomi and cheap ones at that etc) have at least 4g. Other times, while I do have service, I can't make or receive calls and even if I can, it's dropping after the first minute or so. Trying to use mobile data is a mess too, working rarely and most of the times I get that exclamation mark and cannot access the internet. It's starting to cause issues at work.
Note, that I use the phone with dual sims from different carriers and the issue is the same. I tried using only a single SIM thinking it might have something to do with dual sims but nothing.
I tried everything, from factory reset, to reseting network settings, airplane mode for 30seconds, custom roms, custom apns etc etc.
The sims work as they should on a poco m3 that I also own, but on the F3 the issue remains.
Now, the issue is much work with android 12, both with MIUI and custom rom (using PixelOS at the moment).
Do you think it is a hardware issue? Should I try an android 11 custom rom and see if the issue is fixed? Is there anything else I should try?
It's driving me crazy and since it's causing work related issues I am thinking of just getting a new phone at this point.
Thanks in advance.
Rollback miui first to any android 11 version, see if the issue remains.

Then if you want you can flash custom roms and such... Your firmware got updated to android 12 when you upgraded miui , installing custom ROM won't downgrade it that's why you want to rollback miui
 
  • Like
Reactions: crashpoum99

crashpoum99

Senior Member
Aug 3, 2015
62
21
23
Thessaloniki
Xiaomi Poco F3
Thank you for your reply.
I need some time to do this proccess since I am practically 24/7 on call, but I will surely give it a shot when I get the chance.
Just a question though. Is it something common with this phone? A quick google search shows it happens with android 12 on the oneplus phones, but I got nothing for the poco f3.
Some time ago, with a similar issue, all I had to do was flash a kernel and it got fixed. Do you think there is a chance it is kernel related?
 

Rstment ^m^

Senior Member
Aug 19, 2018
381
121
Xiaomi Poco F3
Thank you for your reply.
I need some time to do this proccess since I am practically 24/7 on call, but I will surely give it a shot when I get the chance.
Just a question though. Is it something common with this phone? A quick google search shows it happens with android 12 on the oneplus phones, but I got nothing for the poco f3.
Some time ago, with a similar issue, all I had to do was flash a kernel and it got fixed. Do you think there is a chance it is kernel related?
No idea... I don't think kernel houses firmware components tho , they live in their own separate partition
 

cyanGalaxy

Senior Member
Dec 30, 2018
686
308
24
Germany
Sony Xperia M
Moto G4
You can use DSU Sideloader. This allows you to boot into Android 11 and check Cell-connectivity & Wi-Fi, without touching your Main OS.

Basically, you download the Android 11 GSI, extract the "system.img", set up the app (either through Root or ADB), select "system.img" and Install.

That app utilizes Android's DSU feature, but lets you install any GSI you feed it.

Android has a built-in 'DSU Loader' in Developer Options, but it only lets you install the Android 12 and Android 13 Beta GSI, not older ones like Android 11. ^^

Note: GSI's don't work on Xiaomi.eu Custom ROM. May also not work on other Custom ROMs. ^^
 
Last edited:

crashpoum99

Senior Member
Aug 3, 2015
62
21
23
Thessaloniki
Xiaomi Poco F3
You can use DSU Sideloader. This allows you to boot into Android 11 and check Cell-connectivity & Wi-Fi, without touching your Main OS.

Basically, you download the Android 11 GSI, extract the "system.img", set up the app (either through Root or ADB), select "system.img" and Install.

That app utilizes Android's DSU feature, but lets you install any GSI you feed it.

Android has a built-in 'DSU Loader' in Developer Options, but it only lets you install the Android 12 and Android 13 Beta GSI, not older ones like Android 11. ^^

Note: GSI's don't work on Xiaomi.eu Custom ROM. May also not work on other Custom ROMs. ^^
That's a cool feature and thank you so much for the reply.
However, when trying it, I get stuck on the Poco logo and then straight to recovery. So I guess it doesn't work on the rom I am using.
Rebooting back to system from TWRP works as it should, so there are no further issues.
Tried the two official images from google, and the result is exactly the same.
 

cyanGalaxy

Senior Member
Dec 30, 2018
686
308
24
Germany
Sony Xperia M
Moto G4
That's a cool feature and thank you so much for the reply.
However, when trying it, I get stuck on the Poco logo and then straight to recovery. So I guess it doesn't work on the rom I am using.
Rebooting back to system from TWRP works as it should, so there are no further issues.
Tried the two official images from google, and the result is exactly the same.
Hm, I don't know.
You just need an unlocked bootloader (in most cases apparently).

When it didn't work for me, it was solely because of the Custom ROM Xiaomi.eu. Doesn't work at all there.
You're on Stock MIUI, I think, and it should work there normally. For me it does.
 

crashpoum99

Senior Member
Aug 3, 2015
62
21
23
Thessaloniki
Xiaomi Poco F3
Hm, I don't know.
You just need an unlocked bootloader (in most cases apparently).

When it didn't work for me, it was solely because of the Custom ROM Xiaomi.eu. Doesn't work at all there.
You're on Stock MIUI, I think, and it should work there normally. For me it does.
That's all true I guess.
But as I stated, I am on the PixelOS custom rom at the moment.
Just to see if the issue was MIUI specific, turning out it isn't.
I will return to MIUI 12.5 when I get the chance regardless.
 
  • Like
Reactions: cyanGalaxy

crashpoum99

Senior Member
Aug 3, 2015
62
21
23
Thessaloniki
Xiaomi Poco F3
Did you ever get the signal problem solved?
No, not at all unfortunately. Tried everything, even downgrading and switching around custom roms.
I figure it's a hardware issue and have since swapped my sim to my older Mi 9 Lite and use that device only for calls and data hotspot.

If, however, you have some solution to propose I will gladly give it a shot!
 

Fireball3

Member
Sep 30, 2016
6
0
Hi, I also got myself the Poco F3 in June 2022.
Some days ago (~end of September) it started having little to no signal in places that I usually had good signal coverage.
I use 2 SIMs. I tried any combination of SIM as well as single SIMs.
Signal is bad and even if the indicator shows signal with severals bars, calls are not going out nor can I receive calls.
MIUI is
I thought of resetting the phone but after reading this thread I prefer to return the phone as long as it is still stock rather than wasting my time.
There are several posts about this issue on Amazon as well.
 

ALGOPOP

Senior Member
Feb 27, 2010
54
31
Same here. Simcard works fine in my Mi 8 and iPhone 7. Went back from LineageOS to MIUI, but MIUI tells me the Simcard "can't be activated" and doesnt get signal at all. With my Mi 8 i have 4G coverage.
 

alkxx

Member
Dec 10, 2016
25
3
I do have the exact same problem.
Tried different roms A11+A12, MIUI+Custom, even opened it up to check if the antenna cable was loose.

Has anybody fixed that problem?
 

gurripato

Member
Oct 5, 2022
5
0
did you manage to fix it? I had the same problem in pixelOs and now I want to install pixel experience but it worries me
 

Xblade234

New member
Sep 23, 2017
3
0
did you manage to fix it? I had the same problem in pixelOs and now I want to install pixel experience but it worries me
i was facing the same problem, it was solved when i flashed Xiaomi.eu 13.0.6.0 via fastboot.

its working perfectly since that, at least in xiaomi.eu. I didnt try any other rom.
 

alkxx

Member
Dec 10, 2016
25
3
I'm on the latest xiaomi.eu weekly beta and I do sometimes have a signal, but it's really unstable.
 

Top Liked Posts

  • There are no posts matching your filters.
  • 2
    Hello everybody.
    I have an issue with the Poco F3 regarding signal and networking.
    After the last update to MIUI 12.5 and later MIUI 13, my phone was having issues making and receiving calls and also using mobile data.
    Before those updates, I had no issues whatsoever.
    I unlocked my bootloader and decided to try a custom rom, thinking it will solve this issue but nothing has changed.
    I have "no service" in areas were many other phones (xiaomi and cheap ones at that etc) have at least 4g. Other times, while I do have service, I can't make or receive calls and even if I can, it's dropping after the first minute or so. Trying to use mobile data is a mess too, working rarely and most of the times I get that exclamation mark and cannot access the internet. It's starting to cause issues at work.
    Note, that I use the phone with dual sims from different carriers and the issue is the same. I tried using only a single SIM thinking it might have something to do with dual sims but nothing.
    I tried everything, from factory reset, to reseting network settings, airplane mode for 30seconds, custom roms, custom apns etc etc.
    The sims work as they should on a poco m3 that I also own, but on the F3 the issue remains.
    Now, the issue is much work with android 12, both with MIUI and custom rom (using PixelOS at the moment).
    Do you think it is a hardware issue? Should I try an android 11 custom rom and see if the issue is fixed? Is there anything else I should try?
    It's driving me crazy and since it's causing work related issues I am thinking of just getting a new phone at this point.
    Thanks in advance.
    2
    You can use DSU Sideloader. This allows you to boot into Android 11 and check Cell-connectivity & Wi-Fi, without touching your Main OS.

    Basically, you download the Android 11 GSI, extract the "system.img", set up the app (either through Root or ADB), select "system.img" and Install.

    That app utilizes Android's DSU feature, but lets you install any GSI you feed it.

    Android has a built-in 'DSU Loader' in Developer Options, but it only lets you install the Android 12 and Android 13 Beta GSI, not older ones like Android 11. ^^

    Note: GSI's don't work on Xiaomi.eu Custom ROM. May also not work on other Custom ROMs. ^^
    1
    Hello everybody.
    I have an issue with the Poco F3 regarding signal and networking.
    After the last update to MIUI 12.5 and later MIUI 13, my phone was having issues making and receiving calls and also using mobile data.
    Before those updates, I had no issues whatsoever.
    I unlocked my bootloader and decided to try a custom rom, thinking it will solve this issue but nothing has changed.
    I have "no service" in areas were many other phones (xiaomi and cheap ones at that etc) have at least 4g. Other times, while I do have service, I can't make or receive calls and even if I can, it's dropping after the first minute or so. Trying to use mobile data is a mess too, working rarely and most of the times I get that exclamation mark and cannot access the internet. It's starting to cause issues at work.
    Note, that I use the phone with dual sims from different carriers and the issue is the same. I tried using only a single SIM thinking it might have something to do with dual sims but nothing.
    I tried everything, from factory reset, to reseting network settings, airplane mode for 30seconds, custom roms, custom apns etc etc.
    The sims work as they should on a poco m3 that I also own, but on the F3 the issue remains.
    Now, the issue is much work with android 12, both with MIUI and custom rom (using PixelOS at the moment).
    Do you think it is a hardware issue? Should I try an android 11 custom rom and see if the issue is fixed? Is there anything else I should try?
    It's driving me crazy and since it's causing work related issues I am thinking of just getting a new phone at this point.
    Thanks in advance.
    Rollback miui first to any android 11 version, see if the issue remains.

    Then if you want you can flash custom roms and such... Your firmware got updated to android 12 when you upgraded miui , installing custom ROM won't downgrade it that's why you want to rollback miui
    1
    Hm, I don't know.
    You just need an unlocked bootloader (in most cases apparently).

    When it didn't work for me, it was solely because of the Custom ROM Xiaomi.eu. Doesn't work at all there.
    You're on Stock MIUI, I think, and it should work there normally. For me it does.
    That's all true I guess.
    But as I stated, I am on the PixelOS custom rom at the moment.
    Just to see if the issue was MIUI specific, turning out it isn't.
    I will return to MIUI 12.5 when I get the chance regardless.
    1
    Have you guys tried different version of the firmware?


    Best to use the latest, but you can also try downgrading (but stay within v13 firmware).

    I e.g. use the latest, at the time of writing that's v13.0.9

    Note: Firmware and ROM are not to be confused with each other.
    Tried most of the v13 FWs, no change.