Make sure that your phone is running the latest software. You can find out more about the software changes for Lumia phones from here.
- What Bluetooth profiles are used on my Lumia phone?
- How can I check the IMEI number of my Lumia phone?
- What to do if POP/IMAP email sync fails with error code 80070015 or 80004005 in my Windows Phone 7 device ?
- I cannot hear the other person in a call
- My Lumia touch screen is not responding or is responding the wrong way