Make sure that your phone is running the latest software. You can find out more about the software changes for Lumia phones from here.
- Which languages does Cortana support?
- Where can I find info about the amount of memory on my Lumia?
- How do I find the MAC address and other phone information of my Lumia phone?
- Where are the stories stored and how can I view them later?
- What is the difference between public and private sharing in the Storyteller app?