中国联通 互联网和 MMS APN设置为 松下 P55 Max

Go to Settings More / Mobile networks Access Point Names

Press ➕ on right top corner.

Name: China Unicom
APN: 3gnet
Proxy:
Port:
Username:
Password:
Server:
MMSC: http://mmsc.myuni.com.cn
MMS proxy: 10.0.0.172
MMS port: 80
MCC: 460
MNC: 01
Authentication type:
APN type:
APN protocol: IPv4
APN roaming protocol: IPv4
Bearer: Unspecified
APN PPP phone number: Not set

Do not change the default values set by device for all blank fields above.