Make sure that your phone is running the latest software. You can find out more about the software changes for Nokia phones here.
- What can I do to free up the phone memory on my Lumia?
- Why does my Nokia Lumia automatically switch on when it is charging?
- Can I change the Windows Phone Store country on my Nokia Lumia phone?
- Why should I update my Nokia Lumia phone software?
- How do I update the phone software for my Lumia (Windows Phone 7)?