cant boot into system after delete system app - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

I just bought k20 pro premium these days
and after I got it,I start to delete some useless system app(using adb),didnt unlockbootloader
What I delete is system browser、system china market、mi video
after that I restart device and it just bootloop
sometimes it goes to miui recovery
but I can use it to reset my devices
is any thing wrong?

Reflash stock rom. You can't uninstall some apps as they are required forMiUI & without them you'll get bootloops

Related

Miui 8 - System App Remove From Stock Recovery Rom

Hello guys,
My mi5 is Miui 7.5 and I did download full rom Miui 8.1.2.0 via updater app.
I wanna delete one or two system apps that I don't want on the phone.
Can I remove some system apps from the full rom 8.1.2.0?
I did try edit system.img from fastboot rom. Unpack it, deleted apps and repack. But Miflash didnt allow that.
So maybe recovery rom can help me.
Any advice? Regards...
You have to have root to do that. I think you can not manipulate the official roms like that because they are signed. Install what ever official you like and then with root remove them. (which means you need to have unlocked bootloader)

Flashing chinese Mi9 issues and getting stuck in bootloop

Hi all,
So over the last day I have decided to install twrp and flash a new rom on my Chinese Mi9. Previously I have locked the bootdoader and installed the global rom. I have adb set up correctly and all relevant PC drivers.
So this is what I did and the problems I encountered. Hoping I can get some feedback as to what may have happened.
1 - Installed TWRP (mauronofrio) then it would get stuck on splash screen. Was told to install TWRP (LR.Team/wzsx150) which I did and it worked. I formatted and wiped my drive to get rid of encryption.
2 - I flashed EU rom (after editing script) using TWRP (wzsx150) then after install it would get stuck in bootloop.
3 - I installed TWRP (mauro) then installed EU rom and success, everything worked well. But I found with this EU rom, most of my apps would not install from play store or my Mi restore would not work, there were apps everywhere. Also EU rom was very buggy flashed it again and still the same issues so decided to go back to global rom. Too many apps would crash for no reason and even clearing cahce/data in app settings would not fix it.
4 - I flashed global rom on TWRP (mauro) and installed fine. But when restarted phone it got stuck in bootloop and couldn't get out of there. Had to use Miflash to flash the rom and start from scratch. I now lost TWRP and got Mi recovery back because of this.
5 - I flashed TWRP (mauro) again and tried global rom once again, flashed magisk etc and once installed rom, the thing got stuck in bootloop again.
6 - I now have flashed TWRP (wzsc150) and have installed global rom and it is installing and restoring fine. Once global rom has installed I have lost TWRP. I am also stuck in bootloop and can't get out.
So basically no TWRP works on my phone.
I have managed to flash phone back to original condition with the global rom. On a positive it still works and the storage is unencrypted.
Does anyone have any ideas or suggestions why my Chinese Mi9 doesn't like TWRP (mauro) and it always gets stuck in bootloop. I just want root access on my phone and google pay to work with unlocked bootloader.
Thank you
This seems to be the theme with 8GB version? I have this version too and makes me worried. I still have about 5 days till unlock insha Allah
These TWRP for Mi 9 are quite beta (no working decryption, no proper backup and restore for example).
If you want to have it, you must use custom rom like EU one.
Stock rom auto re-flashs Mi recovery, period.
BTW, I don't find any unbearable bug the EU rom (most of guys here also have no problem with it), just reinstall the app, backup program such as Titanium backup may introduce a lot of errors...
Sent from my MI 9 using Tapatalk
The apps were fresh installation from Google restore. Even when I deleted them and installed again they still crashed. Gmail, Waze and even checking software version in settings all made it crashed.
So now if I were to install twrp and euro rom again, it shouldn't delete my user data as I no longer need to unencrypt my storage right? Will euro rom just overwrite global rom and keep all my data
ted presley said:
These TWRP for Mi 9 are quite beta (no working decryption, no proper backup and restore for example).
If you want to have it, you must use custom rom like EU one.
Stock rom auto re-flashs Mi recovery, period.
BTW, I don't find any unbearable bug the EU rom (most of guys here also have no problem with it), just reinstall the app, backup program such as Titanium backup may introduce a lot of errors...
Click to expand...
Click to collapse
Do you think when I installed this rom I never did a wipe and all my apps were there on start up. Do you think this might be a cause of certain apps crashing?
Rommco05 said:
...for example I have EEA variant and lastly using Global Dev rom. I still geting regulary updates even when I have TWRP (mauronofrio) and root. Only before every update I need flash stock boot and recovery. Then update phone and then flash back TWRP and Magisk. All the time working my old Magisk + Xposed (Ed) modules working without reinstalling them. Little out of topic here but just wanted to say
Click to expand...
Click to collapse
So with a custom rom like EU rom, everytime there is an update do you have to flash back twrp etc? Do the updates work OTA?
Rommco05 said:
I was talking about official Global Developer rom. To answer your questions. With EU you always need reflash Magisk for sure, if also twrp I don't remember. Yes EU have OTA updates but only full packages and need be flashed over twrp so all bloadware is back.
Click to expand...
Click to collapse
But when you flash back, you don't wipe the cache/data and lose all your stuff do you?
Ok, managed to flash to EU rom with no problems. Works great. Will updating with the updater delete my stuff?
perryano said:
Ok, managed to flash to EU rom with no problems. Works great. Will updating with the updater delete my stuff?
Click to expand...
Click to collapse
It won't.
Sent from my MI 9 using Tapatalk
ted presley said:
It won't.
Sent from my MI 9 using Tapatalk
Click to expand...
Click to collapse
Thank you for all your help with this Ted. It has helped a lot.
So I did the OTA update this morning successfully, but noticed before doing the flash in TWRP, there was a message saying it had to do it that way due to my device been encrypted. That's funny because I have formatted then wiped the drive before installing the rom. Is this a true message?
Always do a full wipe when flashing to a different variant of miui since current twrp has issues on decryption. I also had tons of problems from just resetting only without wiping data. For example flashing to eu from china stable everything worked from just doing factory reset. But google play cannot download any app that has an obb attached for some reason. Most likely problems with file encryption so i did a full wipe now everything works properly.
I'm not able to make TWRP work, its successfully install on terminal and when I reboot and hot volume Up key it bringing me to FASTBOOT mode, and if I do restart system, it and then hold Volume Up key, its again the stock Recovery.
My device is Chinese 8GiB 128GiB. any help will be appreciated. I want to install Xiaomi.eu rom as my current stock Chinese rom with google app giving me horrible battery life, standby battery drain is too bad.
QuakeString said:
I'm not able to make TWRP work, its successfully install on terminal and when I reboot and hot volume Up key it bringing me to FASTBOOT mode, and if I do restart system, it and then hold Volume Up key, its again the stock Recovery.
My device is Chinese 8GiB 128GiB. any help will be appreciated. I want to install Xiaomi.eu rom as my current stock Chinese rom with google app giving me horrible battery life, standby battery drain is too bad.
Click to expand...
Click to collapse
You need to do it quickly.
After successfully installed TWRP in fastboot, hold power button to power off (it will restart instead of completely off), when the screen gone black, very quickly hold the volume up button, hold it until you see the twrp screen.
If you are not quick enough, the phone will boot up and stock recovery will be automatically intstall back, you have to start over: install twrp again.
Sent from my MI 9 using Tapatalk

mi 9 acting STUPID? (bootlooping with any recovery or rom)

so i am on the miui eu weekly up stream and with the last 3 updates my phone is acting odd. first i am unable to root the phone now. if i try the the phone will reboot and act VERY strange, all apps freeze on opening, wifi, bluetooth and other modules dont work anymore and then a hard freeze. remove magisk and the system is back to normal. i cant even use most recoveries, i can only use like 2 specific chinese recoveries or else zips, updates and roms fail to install and bootloop.
Edit: upon looking further it seems my data partition was corrupt somehow, i dont know how but i had to edl flash it to factory to get it working again.
Well, I don't have your problems even my ROM is EU. Please confirm:
1. Which one of TWRP do you have ?
2. Any new ROM detected please always download it and then reboot to recovery and then update it.
God bless
Kris
do it all over again, make sure you flash the latest global stable in fastboot mode instead of in TWRP.

Uninstall any system app and device stuck on mi logo?

Hello guys, first of all my device bootloader is unlocked, install custom recovery orangefox as well as rooted.
Now, the problem is, Whether am on stock or custom rom after any useless system app with root permission, my device always stuck on mi logo.
After that, I have to flash complete rom from recovery to make it work again.
Can anyone please tell me the solution??? How I can uninstall system app without stuck on mi logo??
gurwinderr84 said:
Hello guys, first of all my device bootloader is unlocked, install custom recovery orangefox as well as rooted.
Now, the problem is, Whether am on stock or custom rom after any useless system app with root permission, my device always stuck on mi logo.
After that, I have to flash complete rom from recovery to make it work again.
Can anyone please tell me the solution??? How I can uninstall system app without stuck on mi logo??
Click to expand...
Click to collapse
Any solution please
I don't know how are you uninstalling them but try getting to twrp and flashing the boot img of your rom you using

[Q] TWRP - Unable to create folder /data/media/0/TWRP...

Sorry I know this has been discussed in other forums on xda but I didn't find a solution in my case. I unlocked the bootloader of my Mi 9T Pro (didn't have to wait it just happened immediately). Flashed latest TWRP (twrp-3.5.2_9-0-raphael.img) from fastboot. Before wiping and ROM flashing I wanted to backup my device. TWRP gives me this message - Unable to create folder /data/media/0/TWRP
Tried without fingerprints and lockscreen password (pattern) but nothing changed. And after restarting, stock recovery gets back. How do I make it permanent?
edit - tried with format data - still encrypted.....
I'm on stock MIUI Global ROM 12.5.1
Finally, I decided to go for Oragnefox recovery, flashed it from fastboot (extracted recovery.img from the zip file first) and thus data formating removed encryption. Now flashing pixel experience. Thank you all for your time, if mods decide the can delete this thread.

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