I tried changing ringtones. Same thing. On my first call to Orange, the girl gave me a dialler code to extend the ringing period to the max of 20 sec before vm kicks in. Didn't help. I think it was at 20 secs anyway.
Second call to Orange and they decided to send me a new sim. You see the only change that I know has happened is the sim card. I was on giffgaff and last week I switched to Orange and this problem shows up. The phone acted fine on giffgaff (I only changed because signal coverage is so much better in our valley, with Orange) Just got the new sim today. No change.
I'm on CM10 and even tried nandroiding back to CM9. Nothing I've tried has made any difference.
Just hope someone may have an idea. And, I hope it ain't something simple, cause I'll feel like fool
All the best