Is the mobile phone not connected to the internet when sleeping? Why can I still receive qq and WeChat messages?

If the mobile phone is networked before hibernation, it must be networked after hibernation. There are two situations:

In the case of WiFi, because the mobile phone is constantly turned on when it is dormant by default, if you don't want to receive information when the mobile phone is dormant, you must manually disconnect the network. The method is as follows: in "Settings -WLAN- Advanced", keep WLAN automatically connected in the dormant state and modify it;

If you are on an ordinary mobile network, just disconnect the network before going to bed.