Make sure that your phone is running the latest software. You can find out more about the software changes for Nokia phones here.
- Does my Nokia Lumia use an IP address when it accesses data networks?
- Can I use my Nokia Lumia as a tethered modem for my laptop?
- What is OneDrive?
- I cannot connect to the internet using a mobile data connection on my Lumia (Windows Phone 7)
- I cannot send or receive multimedia messages on my Lumia (Windows Phone 7)