Make sure that your phone is running the latest software. You can find out more about the software changes for Lumia phones from here.
- NFC pairing of the Wireless Charging Plate (DT-903) is not working Device Hub, what can I do?, why?
- How do I find the MAC address and other phone information of my Lumia phone?
- How can I update my Lumia software (Windows Phone 8)?
- How do I change PIN code on my Lumia phone?
- What type of data can I transfer from my old phone to my new Lumia Windows Phone 8?