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: 


The touchscreen does not react to a tap on the screen (e.g. when playing a game, there is still movement of units, etc)
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!
The question is very general but I can give you some common reasons why phones freeze and some troubleshoot steps.


Do a restart by holding the power button and then press restart.
Find out which apps are using the most system resources and unistall them, then check if that fixes the problem. (Common apps like this are Facebook and Facebook Messenger). This app can help you fix RAM issues.
If you see any errors during the crashes post them in the comments or edit the original post
Last option would be to factory reset the phone but as the website says, all described operations you are doing at your own risk.


p.s. also, its not a good idea to post your build number on a public forum.