View your exact IMEI, current signal strength in dBm, and active network type (5G/4G). You can also lock your phone to "NR Only" (5G Only) if your local carrier drops to 4G too frequently.
( *#*#86943#*#* ): Used to enable or disable the software-side check for Voice over Wi-Fi support. Alternative: Hidden CIT Menu via Settings how to use secret codes on poco x6 pro
In the *#*#4636#*#* menu, changing the preferred network type to an unsupported band can completely drop your cellular signal. If you lose signal, revert the setting back to the default "NR/LTE/WCDMA" option. View your exact IMEI, current signal strength in