Sau, mai simplu:
On the emergency dial screen dial *3001#12345#* and tap Versions. This will give you some information on the iPhone. It will tell us the Modem Firmware Version and the LCD Panel ID. Use this information to determine what Phone Firmware you are running from the table below.
Modem Firmware iPhone Firmware
03_12_06_G Firmware Version 1.0.0
03_14_08_G Firmware Version 1.0.2
04_01_13_G Firmware Version 1.1.1
04_02_13_G Firmware Version 1.1.2