To stop my tablet 4 7.0 from freezing, I cleared the cache for everything loaded on the tablet. After a couple uninstalls reinstalls of Facebook and Messenger, it was working better. But started freezing every now and then. I uninstalled both again for a few hours. When I went to reinstall Facebook, there was an update that hadn't been there ! I did update & suddenly, after another reinstall, both Facebook and Messenger have been working without issues......so far !! Also uninstalled some apps that were " Gifts" from Galaxy I had no use for. I've got more room & the tablet is fine !!! I'm thankful a Hard Reset wasn't needed !! But I'm prepared if I must do it in the future !
Thanks for your answers, lampreyriver