Lost SIM Card Detection and Signal after reboot - Xiaomi Redmi Note 5 / 5 Plus Questions & Answers

Hello everyone, after unlock procedure and install global stable 9.5.3.0, i lost sim card detection and no signal.
I have a routine to make sim card detectable and signal on. (I have a rooted rom, and unlocked my phone)
First step :
Connect phone with USB
On pc with adb cmd :
adb shell
su
dd if=/dev/zero of=/dev/block/mmcblk0p13
dd if=/dev/zero of=/dev/block/mmcblk0p14
dd if=/dev/zero of=/dev/block/mmcblk0p16
Reboot the phone
At this point i lost IMEI (IMEI 0) but my SIM card is detected.
Second step :
put phone on fastboot mod
On pc fastboot cmd :
fastboot flash modem NON-HLOS.bin
Start phone
Third step :
On pc adb cmd :
adb shell
su
setprop sys.usb.config diag,adb
With QPST on PC, i restore a qcn file found here androidfilebox.com/app/redmi-5-plus-modem-firmware , MEG7 modem version.
Reboot the phone.
Here, SIM card detected and Signal ON, so all is OK.
BUT Fourth step :
When i reboot the phone , i get back to no sim card detected, and i have to repeat the process. :s
So my question is how could i keep my settings and get full use of my phone even if i reboot...
Sorry for my english, i'm trying my best here

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i have the same issue on my Zuk Z2, but i haven't make it;
if you could read chinese, maybe this wil be helpful for you.
club.lenovo.com.cn/thread-4224052-1-1.html

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Still need help

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Aaaaaand still need help

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Dini62 said:
Hello everyone, after unlock procedure and install global stable 9.5.3.0, i lost sim card detection and no signal.
I have a routine to make sim card detectable and signal on. (I have a rooted rom, and unlocked my phone)
First step :
Connect phone with USB
On pc with adb cmd :
adb shell
su
dd if=/dev/zero of=/dev/block/mmcblk0p13
dd if=/dev/zero of=/dev/block/mmcblk0p14
dd if=/dev/zero of=/dev/block/mmcblk0p16
Reboot the phone
At this point i lost IMEI (IMEI 0) but my SIM card is detected.
Second step :
put phone on fastboot mod
On pc fastboot cmd :
fastboot flash modem NON-HLOS.bin
Start phone
Third step :
On pc adb cmd :
adb shell
su
setprop sys.usb.config diag,adb
With QPST on PC, i restore a qcn file found here androidfilebox.com/app/redmi-5-plus-modem-firmware , MEG7 modem version.
Reboot the phone.
Here, SIM card detected and Signal ON, so all is OK.
BUT Fourth step :
When i reboot the phone , i get back to no sim card detected, and i have to repeat the process. :s
So my question is how could i keep my settings and get full use of my phone even if i reboot...
Sorry for my english, i'm trying my best here
Click to expand...
Click to collapse
Read you message.
In reality I never went through something like this on my note 3. My best guess the qcn file you used is not compatible and efs may be corrupted too.
Many users were facing issues like this so I made a thread to help them. Some users reported a permanent fix while some were never able to get it to work.
Possible fix:
Find a backup of modemst1 modemst2 and fsg from another user if he/she may be willing to share.
Flash the files using fastboot command.
Fastboot flash modemst1 modemst1 and so on.
And then change IMEI and Mac address manually.
Worst case scenario:
You may need a motherboard replacement if nothing works.
But I think it is possible that your efs partition as a whole is corrupted.
adb shell
su
dd if=/dev/zero of=/dev/block/mmcblk0p13
dd if=/dev/zero of=/dev/block/mmcblk0p14
dd if=/dev/zero of=/dev/block/mmcblk0p16
These command erase the modemst1 and modemst2 and fsg partition that makes up the efs. What you need is these three partitions from someone else device that are not corrupt and flash them on your device.
For anymore help contact me on:
Telegram - Archit9169
WhatsApp - 9169834624

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Thanks to answer, i'm gonna try to get those partitions, it could be hard

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I'm facing very similar issue after an ota update. However, I get the sim detected on a simple reboot for a few minutes. Please update if the solution worked.

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Hello. I'm facing similiar issue on MEG7 vince. I can't restart my phone because every time loses the baseband and sim detection. My rutine to get back is:
1.- Flash via trwp a shared good one similar EFS partition backup. With this step I recover the baseband and the sim detection BUT the status of SIMs are "radio off" don't have signal and can't do calls. (the IMEI remains despite the lost baseband)
2.- Flash via QPST a xqcn backup ( I founded 2 files on google). Reboot the phone. Sometimes the signal and baseband come back without problem BUT sometimes I back to the beggining, without baseband and sim detection. It's really annoying.
Now I have obtained a modemst1 modemst2 and fsg images of a identic model. My question: how to flash it? with twrp? fastboot? adb?
Thanks for the suggestions.

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I'm facing the same thing but only on 2nd sim slot. The 1st slot work flawlessy. Switching sim card doesn't matter.
It recognizes the operator and imei but signal is gone!!! I've tryed everything, flashing miui 9.6.4, 8.8.2, via fastboot and test point!! Relocking bootloader... flashed 00000080_0.xqcn as well.
nothing has worked.
I haven't tryed your solution, can you share all files needed? Thanks.

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Anyone can help me?
I don't think it's hardware issue, because Sim's operator is recognized... But signal strength always show -1dbm 99 asu, whatever I do in network type (global,LTE etc..) and only on 2nd slot.

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cristhian7cz said:
Now I have obtained a modemst1 modemst2 and fsg images of a identic model. My question: how to flash it? with twrp? fastboot? adb?
Click to expand...
Click to collapse
Hello cristhian7cz , i still have this issue.
With your files, u could try Archit9169 solution :
"
Possible fix:
Find a backup of modemst1 modemst2 and fsg from another user if he/she may be willing to share.
Flash the files using fastboot command.
Fastboot flash modemst1 modemst1 and so on.
And then change IMEI and Mac address manually.
"
If you have issues, or don't know what to do, may u send me modemst1, modemst2 and fsg files you get ?

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tried Archit9169 solution but still no luck

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Ohh I'm not alone at least. Had this problem with my 1st simcard slot and so far I didnt find any solutions worked. Re-locking, upgrade and even downgrade, but nope
I hope someone enlighten us

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[https://forum.xda-developers.com/re...xtracttarfork-process-error255-t3656328/page2
QUOTE=Rayquaza;77634878]Ohh I'm not alone at least. Had this problem with my 1st simcard slot and so far I didnt find any solutions worked. Re-locking, upgrade and even downgrade, but nope
I hope someone enlighten us[/QUOTE]
Bro is modem issue,i solve it with flashing NON-HLOS.bin extract from rom i am using when thing goes wrong,u can try with twrp but i use fastboot
Sent from my Redmi 5 Plus using XDA Labs

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XavierBrian said:
[https://forum.xda-developers.com/re...xtracttarfork-process-error255-t3656328/page2
QUOTE=Rayquaza;77634878]Ohh I'm not alone at least. Had this problem with my 1st simcard slot and so far I didnt find any solutions worked. Re-locking, upgrade and even downgrade, but nope
I hope someone enlighten us
Bro is modem issue,i solve it with flashing NON-HLOS.bin extract from rom i am using when thing goes wrong,u can try with twrp but i use fastboot
Sent from my Redmi 5 Plus using XDA Labs
Click to expand...
Click to collapse
I'm running AOKP 8.1, do I need to flash that file from extracted rom I'm running at?

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Rayquaza said:
I'm running AOKP 8.1, do I need to flash that file from extracted rom I'm running at?
Click to expand...
Click to collapse
Yeah u should! extract the rom look for that hlos thang
Sent from my Redmi 5 Plus using XDA Labs

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i'm still trying to fix my phone.
if someone has a backup from modemst1 modemst2 and fsg, i'm searching for them

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derekk75j said:
I'm facing the same thing but only on 2nd sim slot. The 1st slot work flawlessy. Switching sim card doesn't matter.
It recognizes the operator and imei but signal is gone!!! I've tryed everything, flashing miui 9.6.4, 8.8.2, via fastboot and test point!! Relocking bootloader... flashed 00000080_0.xqcn as well.
nothing has worked.
I haven't tryed your solution, can you share all files needed? Thanks.
Click to expand...
Click to collapse
Have you found a solution of your 2nd sim slot problem? I have the same problem

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No, haven't tried yet. I would like follow this guide
https://youtu.be/PvvcQZfeqNI, but using a modem backup meg7 version (xqcn). But i have to repair my PC first. What did you try so far?

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proyectos3d said:
Have you found a solution of your 2nd sim slot problem? I have the same problem
Click to expand...
Click to collapse
I can't believe!! I was on arrow os pie: i flashed miui am founded here
and then magisk 17.3 and voilà: my 2nd slot sim has back again, and works flawlessly!!