These are apparently the settings
https://www.fixya.com/support/t26922303-apn_settings_safetynet_wireless_lifeline
APN & data settings
Manual network selection
The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.
Switch 2G / 4G
Turn on / off airplane mode
Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.
Turn on / off data roaming
Turn on / off mobile data
From - https://support.t-mobile.com/docs/DOC-28547
this is the instructions for samsung on how to change settings
https://www.t-mobile.com/support/devices/android/samsung-galaxy-j7/network-apn-and-volte-samsung-galaxy-j7#steps1
Press the Menu key and save. Reboot your phone and test your data connection by opening a web page.
mmsmvno.com
/mms/wapenc
SOURCE: Apn settings for safetynet wireless lifeline on my kyocera zte N3192
APN & data settings
Manual network selection
The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.
Switch 2G / 4G
Turn on / off airplane mode
Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.
Turn on / off data roaming
Turn on / off mobile data
From - https://support.t-mobile.com/docs/DOC-28547
If you need further help, I’m available over the phone at https://www.6ya.com/expert/daniel_a4640839dbb7ec58
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