TFW will be a good carrier or not, depending on your location and the level of coverage that you enjoy. TFW is the shortened form of TracFone Wireless, which is a prepaid cell carrier that operates on larger communicators such as Verizon or AT&T. When you see TFW carrier or ask, “What does TFW mean on the iPhone?”, it means your service is coming through TracFone. It is a good option when one desires cheap plans and good coverage. Make sure that your signal strength and the quality of the call are okay, and that it suits you.