My son and I have identical iPads, 64 Gb with GB & WiFi. We both have the same SIM card provider (O2). All the settings are identical. Yet he can get a strong 3G signal, laying his iPad next to mine whilst I get "No Service'. message. My iPhone also with O2 shows a strong 3G connection. I have just returned from a trip to France and found it impossible to get a 3G connection on iPad but no problem on iPhone. the WiFi works fine. I have changed the settings a hundred times (it feels that way) but still no connection. Can any one suggest why this should be so. Faulty iPad?