Straight Talk offers several mobile phones that are compatible with 4G and 4G LTE networks. Some of these phones include the Samsung Galaxy line of phones, such as the S II, the S III and the S 4. iPhones are also available for purchase from Straight Talk.
If consumers wishes to turn their phones into compatible 4G LTE devices for Straight Talk, Straight Talk also sells SIM cards that users can place in an existing LTE-compatible phone. According to Straight Talk, swapping out the SIM card for a 4G LTE SIM card can increase speed by up to 10 times. These 4G LTE SIM cards are available for purchase on the Straight Talk website as of 2015.