Oh, please. You barely know this girl. What's her favorite color? Is she a cat person or a dog person?Ted, I do more research than this before buying a cell phone.
Is this sentence containing the word cell phone a kind of idiom? I can't what it means...
No, it's not an idiom. The point is that Ted is trying to decide if he wants a long distance relationship with Victoria, but he is new to the relationship. He knows little about her.
When people make buying decisions about products, they often research the various products to compare features, prices, vendors etc. The person is saying that he would spend more time deciding which cell phone to buy than Ted has spent getting to know Victoria.