In my opinion, the j7 is fixed at very high price but specs are not at all good in that range.It does not has gyroscope sensor then also it is recommended as Samsungs one of the mid range gaming phone but many phones at that price range has.It has no fingerprint scanner which is the main cons of this phone.Performance can be good in the initial stage but later I am sure u will get a nice lags on this phone.
I think Moto x play , vibe x3, g4+ are better phones.And plzzz dont take the phone for a stupid service centre.