When the mobile phone makes a packet data connection, the word E will be displayed, indicating that "enhanced data rate GSM evolution technology" is being used. When the mobile phone generates data traffic, the up and down arrows will flash, and the up arrow indicates that data is being transmitted uplink, for example, the mobile phone is sending data to the base station;

The down arrow indicates that a downlink data transmission is in progress, for example, you download data from a web page. It will be displayed when surfing the Internet or logging in to QQ by mobile phone. As for the amount of traffic, it has something to do with your usage frequency and the content of the website you visit.

mobile phone

A mobile phone, also called a mobile phone, is a mobile phone that can be held in your hand. In the early days, it was commonly called mobile phone because of its large size, and now it has developed into the 4G era. 1973 in April, American engineer marty cooper invented the world's first civil mobile phone, and marty cooper was called "the father of modern mobile phones" from now on.