Both AT&T and T-Mobile provide free SIM cards for customers? unlocked devices. These cards allow customers to switch service providers without switching devices, and the cards can be shipped directly to customers or picked up in stores.
AT&T offers free SIM cards for cellphones, smartphones, tablets and other devices, and these cards are compatible with Apple, Samsung and 10 other manufacturers. Some are available without contracts, and some are LTE-capable for use on the carrier?s 4G LTE network.
T-Mobile provides an online tool to check a customer?s SIM card for compatibility with its network. If compatible, customers can then order a free SIM card, which is shipped at no charge.