My phone was defective, but I didn't know that. I had such a hard time getting cell phone service after upgrading my phone. The US Mobile Customer Service Team worked so hard, day after day troubleshooting with me. Turns out, I needed my new phone replaced! The team was so helpful, so knowledgeable and so friendly. Today Omema helped me switch SIM networks AGAIN after trying both LTE and GSM to see if one might work better over the other (neither worked because the phone was defective) and was so knowledgeable, timely, helpful, and friendly! I absolutely love US Mobile.