Originally, TracFone service was limited to TracFone-branded phones, which are locked to the TracFone service using an internal SIM card. Other GSM phones, even those that were unlocked from another carrier, could not accept a TracFone SIM card, because these are bound to a specific handset. However, in 2013, TracFone unveiled Bring Your Own Phone, and began selling SIM cards that could be inserted into qualifying non-TracFone phones (such as Verizon CDMA phones) to register them with TracFone. In 2015, this program was extended to compatible unlocked GSM phones and renamed "Bring Your Own Device",.
Basic Phone Plans
TracFone occasionally discloses promo codes that will provide additional service units if the customer enters the code when redeeming a service card.
TracFone provides several options to let customers communicate outside the United States:
The only charge to the Tracfone customer for these services is the deduction of actual connect time from the prepaid minutes on the customer's phone. There is no roaming program by which a TracFone phone can be used outside the United States.