回答: 我是在国内买的华为P10，用T-Mobile线路。 由 alan01 于 2019-07-20 0:15

APN & data settings
From any Home screen, tap Apps.
Tap Settings.
Scroll to 'NETWORK CONNECTIONS,'  then tap More networks.
Tap Mobile networks.
Tap Access Point Names.
To reset your APN, tap the Menu icon and then tap Reset to default.
If available, tap the T-Mobile US LTEAPN (the bullet point fills with green).
To verify your APN, tap T-Mobile US LTE with the bullet point filled with green.
Verify and update the following settings for the Data APN:
Name: T-Mobile US LTE
APN: fast.t-mobile.com
Proxy: 
Port: 
Username: 
Password: 
Server: 
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
Multimedia message proxy: 
Multimedia message port: 
MCC: 310
MNC: 260
Authentication type: None
APN Type: default,supl,mms OR Internet+MMS
Default Android provides a text field to enter: default,supl,mms
Samsung provides an Internet+MMS radio button to select.
APN protocol: IPv6
APN roaming protocol: IPv4
Turn APN on/off: APN turned on
Bearer: Unspecified
Mobile virtual network operator type: None
Mobile virtual network operator value: 
Tap the Menu key in the top right.
Tap Save.
Tap the desired APN profile you want to use. The bullet point fills with green next to the APN profile.