[COLOR="rgb(255, 0, 255)"]hello[/COLOR]
root your device
>remove bloatwares and some system apps just be cautious ...
>>get a 3rd party cache cleaner app but small size file, like app cache cleaner a 1 tap app
>>>greenify your apps
>>>>Overclock your device with caution
>>>>>get the app called wakeclock detector free at google play store
>>>>>>get a battery defender app, i personally use One Power Guard by Onexuan
I personally use System tuner ...try it ..
The best slimest, smothest Rom is SnelteNole Rom from gr8nole
Without bloatware und Sam Touchwiz