[auldyin]

Identical phones, compatible, should be no problem.
When we are both out of the house, contacting is fine.

Cannot phone into the house or out of the house because in the house there is no network coverage. Very strange indeed.
I'm beginning to wonder if it has anything to do with wireless routers, so when I get home, I'll disconnect router. I cannot imagine that disconnecting will make any difference though. (I would like to close the loop though).

Cheers

PS Both are unlocked