I have an iPhone 3G & i just recently jailbroke it with the 2.2 software. I am trying to unlock it with yellowsn0w. but, my baseband version is 2.30.03 & the dev team says that yellowsn0w won't work with the version 2.30.03. so, how do i downgrade it or restore it to an older version of the baseband? I have my t-mobile sim card ready to go and everything. any suggestions?