[mmp997]

For the past two months my Omnia 7 Windows phone has not "heard" calls from my wife's phone. She hears a dial tone when she calls me, but I hear nothing. My Omnia 7 phone has no ability to block calls, nor does my provider Giff Gaff provide call blocking. All my other calls in and out are made and received OK, and her Android phone otherwise works fine. What's the answer?

[Jazmac]

Carrier problem. Have them re-provision your device or replace your sim.