What smartphone and phone carrier should I get?

Episode 954 (2:31:02)

Cathy from Long Beach, CA
Samsung Galaxy S III

Cathy has to get a new phone and wants to change to something else from Sprint. She has ruled out AT&T and Verizon, so that leaves T-Mobile. It doesn't have the iPhone yet, though. The real problem could be coverage. Softbank just bought Sprint, so they may improve over time. Leo thinks T-Mobile is the best bet for Cathy and recommends the Samsung Galaxy SIII or the Galaxy Note 2.