Tablet is a generic (prob Chinese build) Android tablet model 7029c_J0918 running Android Kitkat 4.4.4 with MCPE 0.13.1 alpha (but your list above does not offer that!
Just installed the app but cannot get to build a world, have tried various methods but no result, have tried old version 3 with success, have created world but when we reinstall v 13.1 it sees v3 world will allow us to modify it (change from creative to survival & convert to infinite) but will not open it. Message reads: '" - world name- " can't be opened'
It seems this problem has existed since Nov 2014 & has not been resolved at all in any of the versions since v10.
Please can you advise me if the problem is ever going to be addressed or if it is simply a case of "if you're not on Microsoft then **** off"?? Because reading your forums that's how it feels!
Please can you escalate this issue to the highest level, give it to Bill Gates if you can!!
Many thanks!