Below you can find the procedure of China Mobile 4G LTE 5G Internet and MMS APN Settings for iPhone 13 Pro, 12, iPhone 12 Pro, Pro Max, SE, 11 iPad Mini
China Mobile APN Settings for iPhone
From the main menu, tap Settings -> Cellular -> Cellular Data Network -> APN. and enter the following details
Cellular Data:
APN: cmnet
Username: Blank
Password: Blank
LTE Setup(Optional):
APN: Blank
Username: Blank
Password: Blank
MMS:
APN: cmnet
Username: blank
Password: blank
MMSC: mmsc.monternet.com
MMS Proxy: 10.0.0.172
MMS Message Size: 1048576
MMS UA Prof URL: blank