my girl was using her iphone with tmobile using a chip for her sim card. she's not exactly very high tech so i did everything for her, i got her chip and did everything. while i was on a trip to australia she decided to put new songs to her iphone and when she connected her iphone to itunes, it told her that there was a new version for the iphone so she updated it. since then her chip hasnt worked, so now i'm trying to hack her phone to use on t-mobile but without the need of a chip. any advise??