Whose phone

Whose phone.?!!!
In a bar, a man attend da call of a ringing mobile.

Man: hello!

Wife: darling shall i buy 1 diamond ring?

Man: sure honey!

Wife: shall i use your credit card for crystal pendant?

Man: ok dear!

Friends: great to see that you love her so much!

Man: hmm! by the way, whose mobile is this?!? ;)