How to solve the mobile phone often freezes, unable to run phenomenon?

Mobile phones often freezes, believe that won't run for this phenomenon are many mobile phone users will often encounter, especially android mobile phone, in use after a period of time, this phenomenon is particularly common.So for this kind of phenomenon, what should I do?For we shall be together to learn about the causes and the corresponding solutions.
How to solve the mobile phone often freezes, unable to run phenomenon?
Problem analysis: 1, the background program is too much, too much occupied memory, system suspended animation, and even crash;2, mobile phone virus;3, mobile storage data or install too much too much.4, mobile phone parts caused by internal failure.

Processing method: 1, exit part running in the background program, and tell the customer through the HOME button quickly tap and exit recently to run the program method;2, install antivirus software antivirus;3, delete and unloading part of data and programs.4, to the service center to repair or change new phone.