After updating my Samsung Galaxy A7 2015 a700fd to marshmallow 6.0.1 several issues started appearing. First issue is about battery life, its pathetic after upgrading. Second issue is even more serious, wifi and cellular internet is not working fine at all. Even though my other phones are working fine on wifi but a7 has connectivity issue, it doesnt open google play store or any other app requiring Internet, also cellular data doesn't work. I have already tried resetting my phone but problem persist. I had never faced Internet issue earlier(prior to marshmallow update). Am i the only one facing these issues? What should i do now? My galaxy A7 2015 still under warranty. Please suggest possible solution.