It may be that the network speed of campus network is too slow, and the slow network speed of mobile phone is generally related to the network access point used.

Smartphones can be repaired or built with the help of third-party software.

Setting method: enter the menu → Tools → Settings → Connection Settings → Access Point → Options → Add Access Point → Use the default settings → Connection name: UC 1 (or 2 or 3 or 4 or 5, because you will see five groups of parameters below) → Access point name: CMWAP→ Options → Advanced Settings → Mobile IP address (see the following five groups of parameters (continued) → That's it. I suggest you set up more groups, so if you find that the speed is slow, you can change to others. The parameters are listed below for everyone to share. Parameters:

Mobile phone IP address1:10.125.79.129 port: 2992.

Mobile IP address 2:10.28.138.136 Port: 54832.

Mobile IP address 3:10.38.138.136 Port: 54832.

Mobile IP address 4: 211.136.15.9 port: 80.

Mobile phone IP address 5:10.210.231.213 port: 920 1.