So, I have a K40 Pro Plus.
Was on the latest Chinese ROM (updated through updater). Unlocked my phone today.
First flash attempt ended with me being stuck at
Code:
Setting current slot to 'a'
Running the script a second time was succesful but I'm stuck in a bootloop leading to the bootloader.
I switched to the official cable that came in the box, switched to a USB 2.0 port on the computer, nothing works. Tried reverting to China stable (haydn_images_V12.0.9.0.RKKCNXM_20210407.0000.00_11.0_cn_4d535cc4d8; the only fastboot version available), although the flash is successful, I'm still stuck.
Tried every single Xiaomi.eu ROM (xiaomi.eu_multi_HMK40Pro_MI11i_V12.0.9.0.RKKCNXM_v12-11-fastboot, xiaomi.eu_multi_HMK40Pro_MI11i_21.3.17_v12-11-fastboot, xiaomi.eu_multi_HMK40Pro_MI11i_21.4.22_v12-11-fastboot), no change even though the flash process seems to be succesful.
Even tried updating the firmware to fw_haydn_miui_HAYDN_21.4.22_b45e4df1c3_11.0...
For now I'd just be happy to be able to turn the phone off, LOL.