Hi All, My husband dropped his 5S and smashed the screen. We need something to get him through until the new phones are available in September. Can he just go to Walmart and buy a pay as you go phone to use until he can get a 6S? He would just need to put his SIM in the pay as you go phone? We're with ATT by the way and his iphone is not under contract any longer. Thanks for any help!!