Samsung galaxy series going smoothly well and they know how to deal with everything. The easyessay share some recent models which they are going to launch soon.
Just reported as spam.
Just checked that Galaxy tab 2 run Android 4.0.3 (Ice Cream Sandwich), 4.1.1, upgradable to 4.2.2 (Jelly Bean), that is too old for the App to support.
In your marketing information, you should include system requirements to operate, and notable items that will not work, i.e. phones, tablets, operating systems, applications.
There is the notice on User Manual, that Android system should be 5.0 or above.