My one x has developed a problem whereby it only rings occasionally when there is an incoming call, despite the volume being set high. I cannot see any rhyme nor reason for this. I've removed recent software incase that was having an impact but it is still doing it. I can call the phone from another phone right in front of me and it will ring. I can hang up, try again and it won't?? Was wondering if anyone else had had any experience of this? I'm running android v4.04 and Sense v4.1. Help!