iPad 3G Running on T-Mobile & Jailbroken iPad's Can Send Text Messages
Well it looks like all it takes to get an iPad running on T-Mobile is a pair of scissors. It will take a steady hand, but all you have to do is trim your regular-sized T-Mobile SIM card down to Micro-SIM sizes and it's as simple as that. In addition to that, MuscleNerd, a member of the Dev Team, has discovered that a jailbroken 3G iPad using a T-Mobile or non-iPad ATT SIM has the capability to send text messages. Unfortunately (and not surprisingly) the ATT SIM that comes with the iPad restricts SMS and calls.