A young man wanted to get his beautiful blonde wife something nice for their first wedding anniversary. So he decides to buy her a cellphone.

She is all excited, she loves her phone. He shows her and explains to her all the features on the phone. The next day the blonde goes shopping.

Her phone rings and its her husband, Hi hun,he says how do you like your new phone?, she replies: I just love, its so small and your voice is clear as a bell but theres one thing I dont understand though.

Whats that, baby? asks the husband.

How did you know I was at Wal Mart?