Hello guys,
I own a Samsung Galaxy S4 Mini (GT-I9192) and I upgraded it from Android 4.4.2 (Official) KitKat to 5.1.1 Lollipop, from Cyanogenmod 12.1. I noticed that the battery usage it's huge and I wanted to downgrade back to Kitkat.
The problem is, I do have the Official ROM from...