Change tel numbers for facetime
I have 2 iPhones 4s plus iPad 4 all linked to same apple ID. I have 2 tel numbers. How do I change the tel numbers around from 1 to the other? My apple account details show the tel number I want but in FaceTime it is showing my other number which I don't want for face time? Please help how I can change this
iPad, iOS 6.0.2