What does TFW stand for with straight talk?

Just updated my iphone and need to fix the cellular data setting since I use straight talk. But now in the upper left corner it says TFW what does it stand for?

TFW = TracFone Wireless, the company that owns Straight Talk.

The same thing happened last when I updated & I also had to change my APN settings. But to answer your question, I don't know, if you really wanna know, you can call straight talk support number, might be able to answer your question