*#*#0588#*#* – Proximity sensor test
*#*#2664#*#* – Touch screen test
*#*#2663#*#* – Touch screen version
*#*#0*#*#* – LCD test
*#*#0673#*#* OR *#*#0289#*#* – Melody test
*#*#0842#*#* – Device test (Vibration test and BackLight test)
*#*#3264#*#* – RAM version
*#*#0283#*#* – Packet Loopback
*#*#232331#*#* - Bluetooth test
*#*#232337#*# - Shows Bluetooth device address
*#*#232338#*#* – Shows WiFi MAC address
*#*#1472365#*#* - GPS test
*#*#1575#*#* - Another GPS test
2. Obtaining Firmware information
*#*#1234#*#* – PDA and Phone
*#*#1111#*#* – FTA SW Version
*#*#2222#*#* – FTA HW Version
*#*#44336#*#* – PDA, Phone, CSC, Build Time, Changelist number
*#*#4986*2650468#*#* – PDA, Phone, H/W, RFCallDate
3. Backup
*#*#273283*255*663282*#*#* - a menu in which you can backup your files
4. Service mode
*#*#197328640#*#* - you can change settings or run tests in service mode
5. Change ”End Call / Power button
*#*#7594#*#* - change the “End Call / Power” button action in your phone
6. Reseting phone
*2767*3855# – used to reset your phone to factory settings. Be careful with it though, this option will remove files, setting etc
*#*#7780#*#* - this will perform a factory data reset, removing Google account settings stored in your phone, downloaded applications, system and application data and settings
7. Information about your phone
*#*#4636#*#*- it will show you: battery information, battery history, phone information, usage statistics
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