Hi there, I have an Unlock Iphone 4 running 01.59.00 with 4.0.1. I need to upgrade the firmware to either 4.1 or something higher WHILE keeping 01.59.00. Now here's my question: Is this possible, and if so how? Also, if I do this successfully, will UltraSnow work with firmware 4.1 AND 01.59.00 baseband? I MUST have this phone unlocked. Please let me know what I should do. Thanks in advance!