I had Samsung s5830 with internal memory 512 inside. Although i rooted it and install Link2SD to free up some space, it still slows.

Then, i try to remove samsung native and android native applicationss to make it run faster.

So, here are the steps.

1. Make sure your have root your android smartphone, How? Just Googling around!
2. Make sure you have Link2SD application, and set it to store new just installed application to SDCard.
3. You have downloaded QDF – Root App Delete on Play Store, or here
4. Specify what native app you will unInstalled, for example, i don`t need Yahoo Wheater, samsung Application, Social Hub, Live wallpaper, etc.
5. Find them and disable.

Speed Up Android Phone By Removing Unnecessary Apps