I had this problem also. I took the phone apart to look at the reader, and the tiny solder points scared me. I had pulled the phone apart and so I just put it back together and set it aside. Then, a few days ago I tried the phone for the heck of it, and it worked. All that I can think is that one or more of the connections was loose or corroded and not making contact, and that the disassemble and reassemble corrected the contact issue... just a guess.