When purchase Samsung Galaxy j2 form Flipkart.com then firstly I setup google account on lay store and when is completed then I open play store and I am using wifi then I go to settings and on the option( automatic download apps when I am on wifi)and back on hike page after few time the updates of apps are not install and when I again on then show(GOHSH866 ERROR code in case you need) then I contact to google play store service by email and 15 days ago they cannot give any reply.
Only some installing which is third party applications.
So my 1 year experience and my personal opinion that don’t use the marshmallow update because it not working in galaxy j2.