86 Setup
File system
Format
The telephone memory is formatted and all saved data such as ringtones, pictures, games, etc. is deleted.
Formatting may take longer than one minute.
Clean up
Create more memory by deleting temporary files no longer required.
Master reset
The phone is reset to default values (factory setting). This does not affect the SIM card or the network settings.
Alternatively, in standby mode enter:
*# 9 9 9 9 # A