ios 6 on 4s now no text message tone
Im finding that if i leave a text message open and then lock the screen a no longer get a tone to tell me i have got a reply.
If i close the message then go to the home screen and lock the phone i will then get the message tone when i get a reply.
I have done a full reboot, hard reset, still with no joy
ive missed loads of texts messages due to this.
iPhone 4S, orange . tmobile