Find out what causes freezes of my phone

My phone (Elephone P9000 lite) behaves really strange since some time: Every now and then it freezes for about 1-2 seconds.

There are two different types of freezes:

1. The touchscreen does not react to a tap on the screen (e.g. when playing a game, there is still movement of units, etc)


2. Full freeze - input not working, audio stops, app "paused" (e.g. when playing a game, the movement of unit stops)

I can't identify a specific cause for the problem, i.e. it can happen when I play a game, watch a video, or listen to music (also occurs when the screen is off).

So my question is: Is there a way to find out what causes this problem?

Bonus question: Should I worry about the problem (i.e. could it indicate a hardware/software problem that could lead to a bigger issue)?

• Phone: P9000_lite


• Android: 6.0

Thanks in advance!