First of all, disable all unwanted application.android latest versions such as kitkat,jellybean to help you disable app that you don’t need These disabled apps are not shown on your home screen. whenever you need them you enable it.
Secondly update your application software time to time.whenever you update software, the owner of software fix some bugs and other issues that you may not be aware of … In other hand update regularly will optimum performance and high reliable for your smart phones.
Furthermore, root is third option of increased your mobile speed, a person who root his/her mobile from root app. Root app is give full access of administrative terms as a Linux device