So he decided to buy his wife a cell phone. She is all excited, she loves her phone. He shows her and explains to her all the features on the phone. The next day she goes shopping. Her phone rings and it's her husband.
"Hi hun," he says, "how do you like your new phone?"
His wife replied, "I just love. It's so small and your voice is clear as a bell, but there's one thing I don't understand though."
"What's that, baby?" asks the husband.
The wife replied, "How did you know I was at Wal-Mart?"