Why is my Nokia 1520 acting up?

[Windows Central Question]

I just got my Nokia Lumia 1520 about a week and a half ago, it started acting up yesterday. By acting up I mean it was doing things I didn't tell it to do (push buttons I didn't push). Please help, many thanks

 

[Gustavo Sanchez]

I got my second 1520 a week ago. The first one had a problem with the camera button, which stopped working a few months ago, and got replaced under warranty. However, that issue aside, both phones have worked perfectly. I had the first one for almost a year.