Is it possible to get my top screen to say AT&T again instead of TFW?

So recently I switched my service from my S5 to my iPhone 6plus on straight talk. It said AT&T before but now it just says TFW. I was wondering how to get it to say AT&T again if it was possible. Plus the service has been on AT&T for both under straight talk.

No it isn't possible and for the best security you can get Leo Privacy Guard.

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