Hello everybody. Humbly coming for help. Excuse my english, I'll try my best. I will also try to give you as much info as possible.
Phone: Redmi Note 8T (willow / M1908C3XG), ROM: MIUI Global 12.5.5.0 RCXEUXM.
It's my uncle's phone. I bought him veuxg recently.
Last month, I unlocked bootloader and succesfully flashed his new veuxg with my uncle's Mi Account. Then we tried to unlock this willow. I got message that I can't unlock more phones this month with the same account. So we tried it today and phone's bootloader was unlocked immediately, without waiting time. It have open lock symbol on booting screen and Unlocked status in Settings menu. Mi Unlock also saying It's unlocked.
Now I'm trying to install TWRP and "local" stable ROM. I'm following the non A/B devices guide. But I can't install TWRP.
I've tried many fastboot toolkits, including SDK Platform-Tools and unofficial XiaoMiTool V2. Tried many TWRPs, OrangeFox...in command window on PC i have no errors. Everything seems to be fine. Device is visible.
Trying to flash, command: "fastboot flash recovery twrp.img" - it says it has succesfully done. Then I make "fastboot reboot recovery" and it stays on boting screen (Redmi logo, powered by Android, opened lock symbol). Same with only boot - "fastboot boot twrp.img". If I'm trying to manually boot with physical keys, it boots into Mi Recovery 5.0.
Everything I'm doing on same PC (Win10), same cable, same USB port. I had no problems with my alioth or uncle's new veuxg.
Do you have any idea what's wrong? Any advice how to success? If you need more information, I will post it tomorrow.
EDIT: No SIM inserted, no WiFi connection.
Many many thanks in advance for your help. Have a nice day.