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- Why does the side key seem to get stuck after I put the back cover on the Lumia 520, 521, 525 or 526 phone?
- How to open the back cover on my Lumia 520, 520T, 521, 525, or 526?
- Why is there no key light on my Lumia 520, 521, 525, 526, 625 or 1320 phone when I use it in the dark?
- How do I easily close or switch between recently used apps on my Lumia phone?
- Why some of the photos fail to be chosen as a background under lock screen on my Lumia?