I have an X10 and wish I didnt but I am stuck with it. My phone works ok, calls, texts etc but if I look on the contacts list, right up the top of the list mine says unable to read sim card. In settings, phone detaills, my number is not showing. I have replaced the contract sim and it makes no difference, however my wifes pay as you go sim shows up and my phone can read it. Any ideas on what the problem is?