Are you going to receive your iPhone soon? Did you order it new or used? Here is a very useful application that will allow you to know the bootloader version of your iPhone in a jiffy!
The goal ?
The bootloader version allows you to determine if your iPhone can be cracked completely using unlocking software or if you must use it a TurboSim, iPhoneSimFreer adapter, etc.
Go to the repository Belgium iPhone (http://rep.belgium-iphone.com) from iPhone glass under your install, then install the application ? Baseband Info ".
Once done, go back to the springboard of your iPhone which will perform a soft reset automatically.
Then launch the application which will analyze your iPhone and the result will fall.
As a reminder :
Bootloader 3.9 : Unlockable using software (anySim, iPhoneSimFree).
Bootloader 4.6 : Unlockable using a TurboSim adapter, iPhoneSimFreer, …
Discussion on the forum.