Since my knowledge on the threat defense is not how to understand, and now the mobile phone above all should have the threat defense, but I was never used, until that day, but there are some problems of the mobile phone, I really do not know if this is a threat defense. I had a problem with mobile phone that day, I let a friend gave me a look, he said at the threat defense, said that if the threat defense mobile phone with you, I will not have this problem, then he gave me some threat defense, after listening to me. It is very beneficial, so I decided to learn some knowledge of Defense Threat, in this case, after a problem, you can resolve themselves.