Compared to iPhone, there are much more people use Android Smart Phone. Similar to iPhone, Android Smart Phone is becoming a necessary part for our work and life. We call, send message, communicate and share the information and our mood with various SNS Apps, like Whatsapp, Snapchat, Instagram. We can quickly send/receive email, handle our work. With the third-party payment service, we can also proceed payment. So the security of our Android Smart Phone is vitally important. Now we can learn how to make our Android Smart Phone safer. 1. Set a screen lock. When we activate our Android Smart Phone for the first time, we can set a "pattern lock"-a personalized shape or pattern that is drawn on the screen to grant access. But the finger trace is easily seen. If it is stolen or lost, the others can easily access to the smart phone. So many Android phone maker upgrade the firmware to offer an alternative solution for screen lock-set a pin code, you can set a four-digit pin cod...