freeze

I bought my Nano 2 months ago via amazon. For the first month it worked now, but now it freezes frequently.

Rebooting it will not work. Sometimes it solves itself after 10-20 minutes, but a couple of times I had to restore it from scratch.

I have checked for updates, but this seems to have the most updated software.

Is there a fix?

If not, how do I have it replaced?

Regards

Ran