Device: Redmi K30 Pro Zoom Edition
MIUI: 12.1.3.0.RJKCNXM | Stable
I've got a bug: network speed in status bar isn't correctly displaying. On global stable ROM it's OK
Please go to MIUI forum, then "Mi 5X" subforum and search a thread named "Xiaomi Mi 5X 900E mode semi-unbrick guide". You can unbrick your devices. Unfortunately, I can't put links here.