1. Clear Cache
You can delete the cache of each storage applications by visiting the Settings menu, then select option - delete cache. However, the number of applications on a mobile phone needs more time to do it manually.
or you can use third party applications like Android Tuner.
2. Uninstall Applications are Not Used
Applications that are not used should be to remove. Therefore, applications that do not use will only make you full of useless memory.
3. Install Application Launcher
Mobile application launcher control your desktop, menu lock screen apps, and other important parts. Speed up the application launcher operating systems. There are several launcher apps in the app store. Lightening Home Launcher is a launcher of the fastest and easy to use.
4. Remove Widgets and Shortcuts are Not Necessary
Even if you use an application launcher, your phone will still take up a lot of memory because of existing widgets and shortcuts. Remove widget is not used by pressing and sliding it off the screen.
5. Perform Factory Reset
This is the last step if your phone is not changed after doing steps 1-4, remember before you do the factory reset should do a back up first, this is do to guard - guard and to restore your data after a factory reset.
but it always update your application to avoid bugs that can slow down the performance of your phone.