Episode 1326 (1:42:16)Ryan from Anaheim, CARyan has an older phone and it won't read his T-Mobile SIM. Leo says that's because the phone doesn't support LTE, just GSM. So it's time to get a new phone. LTE is faster anyway and moving forward, it's the future. Topics: Mobile Phones Tags: Mobile Phones, TMobile, GSM, 4G/LTE View the discussion thread.