You can check the amount of available memory, and other technical data in your Nokia Lumia device by selecting Start > Settings > System > About.
- 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)