What's in our Huawei phone codes article? From screen testing to screen testing, there are many more phone settings and test modes. ##197328640## Activating test mode for service ##2664## Testing the touch screen ##232331## Bluetooth test ##0842## Backlight test ##08421TP 5T# Vibration test ##1357946## Information about version, serial number and product ID in the EMUI interface ##2846579## Background settings, Network […]