Lumia 520 hanging a lot

[kataria]

My Lumia 520 is hanging a lot after installing a new sd card and automatically switching on and off and the battery is not charging properly it always show 100% but when I unplug the charger phone switch off. I try to remove the sd card but after removing it the problem doesn't solve. Please tell me how to remove this virus from my phone

 

[kataria]

Anyone to put his hand and solve the issue faced by me

 

[Harrie-S]

First of all you have no virus.
If a soft reset does not solve your problem I would suggest a factory reset. But first make the necessary backups

See below post how to do the backup .
http://forums.windowscentral.com/ask-question/347178-cant-see-lumia-520-any-my-pcs.html

 

[kataria]

It didn't work I have hard reseted my phone 3 times but it keep on switching on and off

 

[RumoredNow]

Lumia 520 has a known issue where (over time) the battery no longer sits tightly in its place.

Make a small shim from paper and insert it under the bottom edge of the battery so that it gets pushed up into the contacts. Not too tight. Just about 3 thicknesses of paper. Also make another shim for under the battery door so it pushes down harder on the battery...

This stops the erratic disconnect with the pins when the phone gets joggled.