It may be cheaper to replace the phone with a non-smart phone.
My daughter wants to upgrade to a iPhone 4 with AT&T. Her old phone was a HTC Inspire with data plan.My wife is currently using a LG Xenon without data but has a cracked screen. Can I switch SIM cards from her LG to my daughter's HTC without adding a data plan. She has unlimited text and voice but doesn't want data. They're both smartphones, the only real difference is the LG is 3G and the HTC is 4G. Can I do this or is AT&T going to charge me for a data plan we don't want? We're all under the same Family Plan, the only difference is my daughter has data added to her line.