Im currently without internet, I jailbroke my iphone 4 and have been using mywi to let me setup a hotspot for my other devices. What I want to do is put my iphone 4 sim into my ipad 3 which has 4g capabilities and use the ipad (with mywi) as the hotspot. My question is this: is there any kind of tweak available that will allow my ipad to use my iphone's sim without being detected by my carrier. I have AT&T with a unlimited data plan. Thanks!