I have a unlocked Galaxy S4 that was on Verizon networks. I am now using MetroPCS and everything works except texting. All APN are confirmed correct. I can send a picture just fine. If I try to send just a text (hello) or any long text it fails every time. I have to add a picture just to text with anyone. Ive been on the phone with Metro, Verizon, Samsung and Not one of them can figure it out. Ive done factory reset a few times. Same results each time. I'm about to toss this phone into the garbage!