Hi! Is it possible to upgrade to ipad baseband 16.15.00 on a iphone 3GS with the 5.1 firmware? i have no shsh to any firmware, execept 5.1 so downgrading it's not an option I wonder beacuse, i just bought it and would like to switch carrier. i know the risks with the ipad bb google didnt give me any substansial info, the 5.1 is just released so ill keep trying google New boot Serialnr: 87030KELEDG Model: MC637K Version: 5.1 (9B176) Baseband: 05.16.05 Thanks in advance! and have a nice weekend!