I have a Motorola XT1687, aka G5 Plus running Android 7.0. After installing and activating the sim card I could make phone calls but could not get data over LTE. I could tell this because when I left my wifi connection I couldn’t get anything on my internet browser, it just said I wasn’t connected to the internet.
I tried the Mint Mobile recommended settings but they weren’t exactly like what was on my phone so I was guessing a lot. This finally worked for me so I can pass it along to help someone else. So here goes...
Select the settings gear icon then More, Cellular networks, Access point names, then hit the little Circle + symbol to add a new APN named Ultra with the following values. Note that Not Set means just bypass that setting, don’t enter anything.
Proxy: Not set
Username: Not set
Password: Not set
Server: Not set
Authentication Type: Not set
APN Type: default,supl,mms
APN protocol: IPv4
APN Roaming protocol: IPv4
APN enable/disable: Greyed out, but set to APN enabled
MVNO type: None
MVNO value: Greyed out, but shows Not set
It may take several reboots (turn phone off, then on) and 15-30 minutes for this to start working. When you can turn off your wifi in settings and still get to the internet in a web browser that means it’s working.
Also be sure the wifi calling preference is ON, set to wifi preferred. This setting is under More from the first settings panel.