These are the most reliable and useful codes for the average user.

| Code | Function | |------|----------| | *#*#4636#*#* | Display phone information, battery stats, usage statistics, and Wi-Fi details. | | *#*#6484#*#* or *#*#64663#*#* | Launch the – tests for display, touch, sensors, cameras, vibration, buttons, and more. | | *#*#2663#*#* | Touchscreen firmware version. | | *#*#2664#*#* | Touchscreen self-test. |

The Ultimate Guide to Xiaomi Secret Codes: Unlock Hidden Settings and Diagnostics

Some codes trigger instant factory resets without asking.