August update

Oh my gosh what's going on I got my August update a few days ago on my T-Mobile account. My battery life is horrible horrible horrible it's just draining a lot faster than ever. Great so the phone's almost a year old, a new models coming out and now my phone's going to start being wonky? Thanks Samsung and T-Mobile... Not!

I'm definitely not installing the August update. Unlocked Exynos 128 GB in Nigeria.
 
Some of my default settings have been changed after the TMobile update. Also, at times my phone is getting hot.