Many years ago, when the first computer came into being, many people predicted the age of computer has come. Now only two decades passed, here comes the new age of cellphone. Let's look at how people depend on the phone. They use cellphone to work and to communicate with families and friends. With the development of technology, online payment is popular and people just need a cellphone to pay all the bills. How convenient it is. We are lucky to live in the age of technology. But at the same time, if we don't control ourselves, we will lose in the technology world, such as some children overuse cellphone and learn nothing at all.