hi, I just took my friend mytouch and change the sim card. I took his out ,which has a data plan. and my sim card/plan doesn't have a data plan. Then the phone started with no problem, even the internet work. so i got a question. how is it possible that the internet is working on my sim card that doesn't have a data plan? was i gating charged for using it? and also if i buy one of ebay and put a sim card with a data plan to unlock the first screen. after that put my sim card in would i still have internet like before( like i did with my friend) or no internet at all just the basic functions of the phone which i want thats why i'm buying it of ebay. I just dont want to be charge for useing internet b/c i dont need it.