You can check the amount of available memory, and other technical data in your Nokia Lumia device by selecting Start > Settings > System > About.
- My Lumia's battery does not get fully charged
- What can I do if the camera on my Lumia phone does not work properly?
- I cannot send or receive text messages on my Lumia phone
- 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)