WiFi and our daily life
Nowadays，the Internet in our daily life is very important.WiFi is the one of it.In our daily life
We always use mobile phone or computer to play games or communicate to other poeple.And most of above usually need a lot of network flow.If you have WiFi，you will save your some network flow.
Aithough WiFi is very useful，it is not convenient and sometimes will give us some problem.For example，it is not exist anywhere.Some no password's WiFi may be have virus can make your phone or computer break.So we should use WiFi carefully.
