Make sure that your phone is running the latest software. You can find out more about the software changes for Lumia phones from here.
- My Lumia phone does not work or respond as expected
- I have forgotten Wallet PIN on my Lumia phone
- I cannot end a call because my Lumia screen remains black
- Can I get a notification if I receive call or text messages from blocked numbers?
- How can I block phone calls and text messages on my Lumia using the call+SMS filter app?