Lumia 640 fell and restarted

[Windows Central Question]

My lumia 640 fell on the ground and has restarted. After touched the ground was jumping up 2-3 cm . That's because the it have something inside or due to my phone cover wich is elastic on margins ? After restart verified the celullar network, GPS, flash led, camera, everything seem to be ok but why restarted? I fear something cracked inside .

 

[libra89]

Is your battery all the way in properly? Sometimes phone restarts are because of the battery.