I have a Samsung Galaxy Tab E 9.6 SM-T560NU running Android 5.1.1. I have done a lot of searching and reading on the web on trying to upgrade/update this to Marshmallow. I have gather I will have to root my device and install a custom ROM, but I'm not certain how to do this properly. It would help to have a step-by-step guide, rather than a general "Root your device and install a ROM" on it. Thanks in advance!