The fact that your iPhone is displaying TFW on the top of your display means your phone is running on the TracFone Wireless network. This is the TFW meaning on iPhone. TracFone is an American-based mobile phone carrier operating under other major cellular-based networks. So,what does TFW mean on the iPhone? It gives you the information that the carrier is TracFone, and although you may use such services as Straight Talk or Net10 (which belong to TracFone), the information remains the same.