Will this remove the carrier programming? Or is that part of the factory setup? I have an unlocked (according to C-Spire, who was my carrier on the S4) S4 that I'm trying to use with Straight talk. I got the Straight talk sim, and followed all directions...several times! But it still says C-Spire on restart. I'm wondering if this would wipe the C-Spire off the phone. Thanks!