T-Mobile US
fast.t-mobile.com
proxy not set
port not set
user not set
password not set
server not set
MMSC http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS proxy not set
MMS port not set
MCC 310
MNC 260
Auth type not set
APN protocol IPv6
APN type default,supl,is,mms,xcap
APN roaming protocol IPv4

Basically the same as the T-Mobile site except they have MMS protocol as WAP 2.0 and I don’t seem to have that setting.

https://www.t-mobile.com/support/devices/not-sold-by-t-mobile/byod-t-mobile-data-and-apn-settings#subhead2

Edit: changed the last statement as MMS protocol is not in my APN settings