Iphone 8 plus works great on cricket. As you guys indicated, moving the SIM from my old iphone 5c to the new unlocked iphone 8 plus was all it took. One interesting thing is that some imessages randomly only get receieved on the old iphone 5c. I can't find any pattern as to why it is. I turned imessage off on the old iphone 5c so hopefully everything gets directed to the new phone.