There are many threads with no definite answers. 1. Please only post if YOU have DONE this and are using a phone with no data plan. 2. How does one do it? 3. Does it work on all versions of the Iphone? ***FYI*** My father in law in using his Iphone that was given to him as a hand me down and just simply replaced his SIM card. He has never changed plans. He has never gotten warnings or text messages from ATT. His payment has been the same the whole time.