[General Topics] LcHrS:
This is my last post in trying to save my Android device for almost a month.

I wanted to detail how I bought it, accidentally broke it, and restored it, and I think it might help someone if you're in a situation like me.

In some places, you can buy something easily at a very cheap price, and in some places even if you work for half a year, you still can't afford to buy something you like, and I belong to the second case.

So when I bought a (secondhand) tablet with my own money, I really appreciated it. Lenovo Tb128fu, but I don't like this lenovo system or any other brand system, I like Google's simplicity and speed, so I decided to flash GSI rom, with previous experience of flashing custom rom on other models, I think everything will be very safe, and this is when Big Trouble appears.

I made a mistake, a fatal mistake. According to the instructions, I downloaded a Gsi rom called bla.img.xz that can be opened with zip. But I don't think so, just because the suffix is img.xz (I want to cry). I changed the suffix from img.xz to img, moved it to trwp and flashed the system image partition.

What will happen will happen, I can't reboot the system, I can only enter fastboot and twrp mode, I checked again and found out that the img file is in bla.img.xz, I didn't have to change the name, it took a few hours to restore but nonscence, I get frustrated and turn off the power and plug in the charger, and the second problem begins(I mistakenly switched to system partition b on trwp and turnoff).

After a few hours of charging, my tablet automatically switched to Qualcomm CrashDump mode and got stuck there. Can't charge anymore because plugging in the charger will appear again, I finally got rid of Qualcomm Crashdump and entered Fastboot, and the part that makes me want to cry here is, Twrp Recovery GONE (Yes, disappear).

Okay, calm down, there's still Fastboot and Edl, I can still fix it, but at that time I didn't know that Fastboot commands no longer work (set active to slot, flash), and now I only have Edl left.

After researching on foreign websites and flashing many different tb128fu roms using QFIL, the device still did not work, I realized that I had to install the original lenovo rom (zui os), maybe everything would work. fix it all. Some supernatural force planted in my head the thought "if I change the twrp files to recovery, put them in the original rom and flash, we won't need to flash twrp anymore. And I did, copying the twrp and the original rom and flashed with Qfil, during the process a partition table suddenly appeared, the blue part was in the recovery section. I didn't think too much but clicked OK, and Boom, yay, THE ENTIRE PARTITION DISAPPEARED, and also one thing is that FLASH WITH QFIL IS NO LONGER POSSIBLE (still have EDL mode).

I thought I had the most expensive paperweight, I gave up, I threw it in the corner for a week until I found some amazing software. Qualcomm Flash Loader (QFL not QFIL). An application that supports rom installation created by an android programmer (V2 available), easier to use than QFIL. Surprisingly, it worked, the entire rom file was flashed in a few minutes, and the device booted, this is the hope that helps me repair my precious tablet... or not.

Actually, it was successful, I got to the publisher logo... and again there, I tried fastboot mode to check, now my serial number has been changed - 0123456789ABCDEF. It's okay, being able to restart the tablet is already a good thing, slowly it can be fixed, but once the problem is resolved, another problem appears.

At this point, QFIL is working, but cannot be flashed as this will erase the entire partition again (I tried), I can install twrp through QFL, but the software seems to have problems appearing error after a few uses and no longer works (this forced me to reinstall windows and freeze before using to ensure no more errors). As for the tablet, for some reason, when in fastboot mode for too long, the entire system will be erased, including twrp (except fastboot mode) no matter how many times I try. Searching on the internet, I realized that my tablet seems to have deleted the partitions that identify the device's information (ssd, misc, frp, oem, modernst1/2, fsc, fsg, ...), Without these partitions the tablet cannot operate.

Luckily these partitions can be backed up with QFIL as .bin, so now there are 2 ways to restore: Buy the same model, backup the system and restore for hardbrick the device (like I said, too difficult because I don't have money) and the other way is to ask someone else to send a .bin file that uses the same device model. But I have to find someone, there's no one, I've been looking for help, but there's been no response. BUT there was an extremely kind person who was willing to backup the entire partition, package it and send it to google drive for the community using Lenovo models like me. With excitement, I downloaded and used QFIL to meticulously install each important partition... and restarted the tablet.

Oh my god, I really want to cry when the tablet runs normally on the ZUI12 version, I really..., after the setup was completed, I downloaded the gsi rom and flashed twrp, everything went very well. Good. And now, I write an article to share this painful experience with everyone using the tablet I was able to fix - after 45 days. I just want to say, if something is important and precious to you, even if you feel hopeless, don't give up, there will be someone, something that will help you, and the whole universe will help you, as long as you believe.

I think this applies not only to my device but all other qualcomm devices, just need firehose, rom, edl mode, and help from a kind person. I'll leave the link to download the device system file here (it's someone else's, so it can be deleted at any time, so back it up if it's important to you). Final word, I hope you all will restore your hardbirck device successfully.

-Thank you PhoneRepairHUB - the only person who responded and provided me with the necessary ROMs (https://disk.yandex.ru/d/QEA6PXMH4KSgAg)

-Thank you Aforan - an account on the 4pda forum uploaded the entire important partition and shared it with the community (https://drive.google.com/file/d/164nEI4ZlZWIzvKORXORW38mSyNamOWa4/view)

-Thank you Sadique Hassan (administrator Droidwin.com) for sharing knowledge about extremely great devices.

P/S please flash vbmeta verification before installing gsi rom, or the device will be bootlooped (and I have to redo the entire process above to restore AGAIN), I flash vbmeta and install system (just system) gsi in twrp recovery.

View attachment 6020631