I traded in My N20 ultra, and spent 285.00 on the device. It worked fine until about 2 months in. My device has been remotely locked and I have tried several times to get Samsung to unlock it. I followed all the rules outlined in the terms and conditions yet they claim to have not received my phone trade in and now expect me to track it down. That's not what is written in the terms. I have been a loyal customer for 7 years and now they illegally locked my device in an attempt to bully me out of another 1000.00 I would never recommend any Samsung product to anyone again.