If your Smartphone is facing lag problem while playing games or you phone is running low on performance. You can fix that with just an amazing application. The one requirement you need is your phone must be ROOTED.This method will work on any android phone If you want to root samsung galaxy s duos 2 you can watch this video below:-
Follow the steps given below or watch the video at the end of steps:-
So first you need to download the ROOT BOOSTER app. Click here to download
Install and Grant the ROOT permission ( you ca use super SU )
Now slide from left to right, then you can see bunch of operations came. There are 3 modes you can choose to run your smartphone on. By default your stock settings will be selected which will give you 70% of stability (watch the video at the end to learn more)
Now from here on you can select your desired mode in your mobile.
After selecting you desired mode click on the arrow facing towards right
After that your phone will be in the mode you have selected.
Performance boost installation video:-