HANGING AND EARPHONES PROBLEM. Review on Samsung Galaxy J7

Samsung galaxy j7 is a good phone .it has very good features and also has bigger screen with amoled display. But the worst thing in this phone is that is lagging ( hanging) alot actually I borrow this phone from my friend for 2 days and I used this phone gor two days and I found too much lagging problem at the time of playing games and at the time of heavy multitasking . When I was playing asphalt 8 on this phone this was hanging alot , whereas this phone gives octa core processor which is good for gaming but at the time of heavy games like asphalt 8 and nova 3 its creating hanging problem and after 20 min. Ist also little heating. . And if I am talking about its earphones its really too bad specially if you are a base lover then you don't like this. I also used samsung s6 edge earphones which is quite good and have very soft sound. But this phone's earphones are not good. .