To start you need to root your Samsung Galaxy S4 Mini and install a custom recovery. I’ve written about this here.
samsung s4 mini (i9190)
WARNING! ONLY USE THIS ON THE GT-I9190 MODEL RUNNING KITKAT 4.4.2! I take no responsibility for your successes or failures.
Some of these you’ll know, hopefully you’ll find something useful. I’ve tried to group the tips to help you focus on areas your phone is not performing the way you’de like. Power Saving Turn off anything you’re not using. Things like Location, Smart Stay, NFC, Bluetooth etc. Useful Fun Screenshot Press & hold down the …