Be wary of "Network Unlocking" codes found on forums. Unlike the diagnostic codes above (which are built into the OS), unlocking codes usually require a unique calculation based on your specific IMEI number and are often paid services. Attempting to guess these via dialer codes can lock your SIM card permanently.
These are the most useful codes for troubleshooting hardware issues. how to use secret codes on xiaomi 11t pro work
Use these codes as exploration and troubleshooting tools, but proceed cautiously: they expose powerful, sometimes hidden operations that can alter or wipe your device. Be wary of "Network Unlocking" codes found on forums
This is the single most useful code for any Xiaomi user. It opens the CIT (Customer Interface Test) menu. This is where you can test every piece of hardware on your 11T Pro to ensure it is functioning correctly. These are the most useful codes for troubleshooting