I was in Japan for 10 days on flight mode and when I touched down back in the UK and turned off flight mode, my mobile data and signal didn't return. My sim card works in other phones. I've turned it on and off multiple times, taken the sim card in and out, ordered a new sim card, did a network reset and even a factory reset on the phone but no luck. The rest of the phone is working completely normally. I don't understand how this can be possible? Any ideas?