Jumpstart iPhone unlocking
Check in the extended post how to avoid buying an iPhone with 1.1.1 firmware
Just check out the serial number on the back of the iPhone box.
It should look like XXX38XXXXXX
The ‘X’ are any alphanumeric character but notice the important 4th and 5th cifers.
Those are important and should be lower than 38 => 37, 36, 35, etc… are ok
38 could be a 1.1.1 firmware, avoid it to be safe, or risk it if no other alternatives..