How can I use my T-mobile prepay micro sim with iphone 4
My wife's T-Mobile phone died last week, she instantly replaced it with her brother's old Sony Ericsson, and is using it with a prepaid TMobile plan. I have an iphone 4. I want to trade her phones for awhile to let her try it out and see if she'd want an iphone.
How can I use my iPhone with both my AT&T service and her prepaid TMobile plan?
I bought her a micro sim and had tMobile move her info to it today, and then put it into the iphone after the sim card was verified and working. It doesn't work. It works with other phones...
I don't want to jail break it, lose support or invalidate my AppleCare protection, but I do want her to be able to use the phone with her own service and her own phone number. How can I do this?