What does TFW mean on iphone?

[techybrain]

TFW is a contraction for TracFone Wireless. An MVNO, or mobile virtual network operator, is TracFone Wireless. On an iPhone, TFW stands for "The Flashing Warning," which denotes a momentary problem with signal strength or network connection. An MVNO does not own its network; instead, it rents coverage from one of the major cell phone providers, including T-Mobile, Verizon, AT&T, and Sprint.

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