My iPhone is already Activated
Its very easy to find the Firmware version on a phone already activated, just touch the Settings button, then General and then About. Scroll down the page to where it says “Version” and jot down what it says.

My iPhone is not Activated
Its a bit more difficult to do here. Ok, we are assuming that the iPhone is brand new here as if you just upgraded, you should know what firmware it is.

On the activation screen, slide to make an emergency call, then dial the following:

*3001#12345#*

and hit the call button. This will take you into field test mode, from here, click on “Versions” down the bottom. 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