Hello Everybody: There is a lot of false rumors on how to check if you have the old or new bootrom. It is not possible to read this off the serial number as many people say! I have the old bootrom and my serialnumber is xx945.
The only way I know of is to set the iPhone in DFU mode:
- Turn off the phone
- Hold power and home button for 10 sec
- Release power button and continue to hold home button for another 10 seconds
Thereafter you can check bootrom version in System Profiler (Mac) or Device Manager (Windows)
iBoot-359.3.2 is the new
iBoot-359.3 is the old
Regards
Rudder