Moto G5s baseband not found (unknown) 😢 IMEI 0 please help

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Soumyadip999

Member
Aug 28, 2016
35
1
I need help too. So, I own a Moto G5s plus sanders. I unlocked its bootloader the day I got it. Didn't keep any backup and rooted it. I Also installed dot os based on android 11. But my 4G Volte connection was finicky. So, I decided to use a Volte zip patch. But, anyways I flashed the zip via TWRP and tried to reboot. But the phone didn't turn on after that. After a few minutes to my shock I understood that I hardbricked my mobile. No button combos, nothing worked. Anyways in my desperation I found a YouTube video showing the use of blankflash to revive a phone and lo and behold I used the procedure to again restore my device. It booted to the fastboot interface. But my happiness was short lived. My baseband was unknown at this point and the bootloader was I dunno downgraded to 0.5 inplace of 2.12. But, more importantly the unlock status was lost. I unlocked it again and all went well. I could even flashed TWRP. but then I realised I couldn't upgrade my bootloader. I couldn’t do anything. It's always gives a "security downgrade", "preflash validation failed" and "permission denied" error. I even tried RSA official rescue tool from Lenovo but even it was unsuccessful. It was never unsuccessful before that. Not even with a unlocked bootloader. I researched for days and tried custom ROMs. I flashed stock images. Nothing brought back my baseband and IMEI. When I type "fastboot oem unlock critical" it gives me permission denied error with a message. "Need OEM signed bootloader." I think 🤔 the blankflash bootloader is the root of all evil. I need to change it and therefore I need to enter the edl mode. I have tried all adb commands and fastboot commands. The phone reboots okay after those commands but never goes into edl mode whatsoever. I am also ready to do a controlled hardbrick of my device to go into the edl mode so that I can use my device again with a proper bootloader and a properly working fastboot. Please help
 

Soumyadip999

Member
Aug 28, 2016
35
1
Greetings everyone. Sorry if I posted this in the wrong forum. Please move this in appropriate forum if I made a mistake. Believe me, for the last 7 days I have searched all of xda and internet, followed innumerable guides, FAQs and workarounds and none worked. So, as a last resort I am starting this thread

Device: Motorola Moto G5s Plus XT1804 ......4GB _64GB variant
Problem: 1) Baseband not found (unknown) Original Baseband: M8953_52.61.07.98R SANDERS_INDIADSDS_CUST
2) IMEI
0 (Sim cards are not detected).

I bought this refurbished phone about an week ago after my last LG went kaput. I was happy by the build quality of the phone. But it only ran Android 8.1 Oreo. So, I decided to put a custom ROM in it. I am not exactly a newbie to the world of CyanogenMods, Lineage OSes and Pixel Experiences. Or, so I thought. Anyways, after a lot of searching I finally decided on Dot OS 5.2 Official Android 11 version. The ROM looked very pleasing and the reviews looked positive. So, I got the unlock key from Motorola website, unlocked the bootloader, put in official TWRP recovery in it. Everything went like a breeze and in all that excitement I forgot to take a backup of the persist, efs and other partitions. A very costly mistake it seems. DotOS booted 🙂 fine and looked really fresh till I found that there is a small cross near the SIM card network signal triangle up righthand side corner and the signal is only LTE and not VOLTE. I was using a Vodafone Sim card at the time. Although VOLTE option was enabled in SIM settings. To confirm my doubts regarding VOLTE I switched to a JIO Simcard and alas I was not able to make a call without redirecting through the horrid JIO calling app. VOLTE was indeed not working. So, I looked up for a fix and I found a Volte ZIP file from here https://www.google.com/url?sa=t&sou...0QFnoECBAQAQ&usg=AOvVaw0YgJvCjQWXXV8WQSJkxBOK . This was the starting of my troubles. I flashed the universal VOLTE fix zip from TWRP and it flashed fine. On rebooting, I found to my shock that my phone was not turning on. I pressed and held the power key and there was no sign of life. I couldn’t go to the fastboot bootloader or recovery. Only the white led blinked at the top when connected to the charger. My phone was apparently hard bricked. I searched frantically for a solution in this forum and YouTube wherein I found that one can bring it back to life by doing a blankflash. Found the blankflash file here https://www.google.com/url?sa=t&sou...wQFnoECAsQAQ&usg=AOvVaw1eVdBWGVFr8aiqLdP-ZkeT followed the instructions and it flashed my bricked device back to fastboot. I was relieved 😌 for a moment but the next I found that the Bootloader version has downgraded from BL C2 07 to BL C0 05. I knew something was wrong as bootloader downgrade shouldn't be possible. Also the unlock and rooted status were also lost and the baseband was unknown at this point. Anyways the device was recognised as a fastboot device and I tried to flash the stock ROM latest version using the fastboot. But, only then I realised there was something wrong with the bootloader. It gave errors like security downgrade, permission denied, preflash validation failed, remote command failed. At this point I was truly confused and worried. Why would it think the latest bootloader to be a security downgrade to a supposedly old bootloader and prevent me from flashing it. However it did flash the other files like gpt.bin for partition, oem.img, boot.img, system.img sparsechunks and everything else. I booted back to Android 8.1 Oreo and everything seemed working except my IMEI now read zero and my Simcard was not recognised by the device. After that I again unlocked my bootloader. Somehow the original unlock key worked and the bootloader screen said flashing unlocked but the bootloader didn't behave like an unlocked bootloader. The TWRP installed fine but couldn’t install the latest Pixel Experience. The flash screen said PE 11 was for Sanders and my device is (blank no name). I tried both the normal and plus and both behaved similarly. Lineage OS unofficial builds behaved similarly. I again tried Dot OS and Arrow OS and both installed fine except there was no signal. For a moment I tried to forget about the bootloader but concentrated on recovering my IMEI and Baseband but I couldn’t. For nearly 5 days I tried different guides including a detailed guide using Validus Sanders ROM but none worked. My EFS folder has files around 12 megabytes but my Persist seems deleted at zero bytes. The IMEI keeps changing between null, zero and unknown depending on the 20 something ROMs I tasted on this device. At this point, I am at a loss. This was to be my main phone and I am financially crunched. I can't buy another phone right now. 😩 I think that blankflash bootloader is corrupted and it is giving me permission denied errors. Even Magisk won't work properly. I even tried using the official rescue and smart assistant tool by Lenovo and it failed at 47 percent. I tried in different computers and Win7 to Win 11 OSes but it was of no use. I also tried getting a QCN file but I couldn’t get one for the device to recover the IMEI. Please suggest something if anyone of you can save this poor device of mine. Thanks in advance
 
Last edited:

Soumyadip999

Member
Aug 28, 2016
35
1
i think this vid will help
Thanks for the quick reply but my phone is soft bricked now. It was hardbricked and I uses a faulty blankflash bootloader to bring it back to life. My device is softbricked now. I have lost my baseband and I have no IMEI. I cannot take calls and no mobile data. Can you show me a way to go to edl mode in my device. Thanks again.
 

Raghaov

Member
Jun 21, 2022
16
2
can your phone turn on if yes can you root it with magisk
if yes then pls tell me i will tell you
 

Soumyadip999

Member
Aug 28, 2016
35
1
I can do everything except calling and mobile data. Yes, I have rooted with Magisk and have root access. But my baseband is unknown and my IMEI is showing zero. I can't call or access mobile data. Although I can use wifi
 

Raghaov

Member
Jun 21, 2022
16
2
so go to magisk manager and on top-right corner you will see setting click the button right next to it and click on reboot to edl
 

Soumyadip999

Member
Aug 28, 2016
35
1
Updated Magisk to latest and tried both edl and download mode like you said brother. Everytime boots back to system. Am I missing something. The phone was not connected to the PC at the time
 

Soumyadip999

Member
Aug 28, 2016
35
1
An interesting observation while installing Xposed, it gave an error that the device is not rooted properly
 

Soumyadip999

Member
Aug 28, 2016
35
1
I have an untouched dump file for my model. The whole thing. Could you please guide me how I can restore my smartphone from that.
 

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    can you flash it through adb sideload fastboot twrp etc