Why sometimes there is a short message on the mobile phone and that thing is surfing the Internet after it is turned off and restarted? (SMS symbols will understand)

The appearance of short messages is that a short message was received, but it was not checked. It will always remind you that the internet is the GPRS connection of the mobile phone. It can be set in the network settings in the phone settings. Generally, there are two options, namely "connect when necessary" and "permanently connect". If it is set to a permanent connection, what you said about surfing the Internet will appear on the screen of the mobile phone. If it is set to "Connect when needed", there is no such icon!