These are the APN Internet Settings Metro which is a network connected to T-Mobile. Consider that was also known as MetroPCS before. You will see the APN settings for Metro are listed here with the settings for Windows, Android as well as the iPhone. These are the Metro APN settings and not the AT&T APN settings. Those you can find elsewhere on this website. The first settings are those for an iPhone and the remainder are those of the Android and Windows operating systems.
APN Internet Settings Metro
These are the Metro APN settings for a iPhone. The settings are short and you will only need the APN name. The username and password are left as is as it is not needed. The Metro we are talking about is what used to be called the MetroPCS.
Username: (leave this section blank)
Password: (leave this section blank)
You will note that the APN settings for Metro or what used to be called MetroPCS only need the APN name while the username and password are left <blank> as has been shown. See the Android and Windows settings which follow. You can also find how to apply the APN settings for Windows on this website as well as the APN settings for an Android operating system.
The MMS Port:
APN type: default,mms,supl
The APN protocol: IPv4/IPv6
APN protocol: IPv4
Most of the settings are added as follows:
Settings > Connections > Mobile Networks > Access Point Names > Add New
Now you add new the you will add the name of the access point which is Metro. From there most of the APN settings are the defaults except for a few. These are the MMSC as well and the APN itself.