TCL 20 Pro 5G Manual page 66

Developer options
To enable this function, go to Settings > System > About phone, then touch Build
number 7 times. Now Developer options is available. The developer options
contain settings that are useful for developing Android applications.
Reset
Tap to reset all network settings and app preferences, you won't lose your data with
these settings.
If Factory data reset is selected, all data in your phone's internal storage will be
erased, please back up your data before reset.
Regulatory & safety
Touch to view product information such as Product model, Manufacturer name,
Manufacturer address, IMEI, CU reference, Bluetooth Declaration ID, etc.
User Experience Improvement Programme
Touch to join the User Experience Improvement Programme so we can continue to
improve our product design and overall user experience.
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