My phone shuts off with the slightest bump?

[WINDOW LOVIN]

I have a Nokia Lumia 521 that sometimes when I set it down (like if i drop it half a centimeter away from the surface or just set it down too fast) or drop it accidently on my rug, shuts off then turns back on. Anyone have this problem? Im starting to think its an issue with the battery but im not sure...i was thinking maybe lose battery? but I dont know.:unhappysweat:

 

[Romer Reyes]

Hey, we have the same problem. But mine is fixed now. I just removed the battery and fix the lock in it. The three coils above your battery. Try to push the towards so they can lock well with your phone.