pretty sure mint uses tmobiles network. should be fine. i use tello, which is also on tmobiles network. 

I have a fairphone 4 and it hasn’t had any issues with the network since I first got it. Generally, any T-Mobile compatible device should work fine.

I would recommend checking their BYOD compatibility page for a more solid answer though.

If you want to verify a device you already own you can also type in the IMEI number and it will let you know immediately if it will have issues.

Mint is owned by T-Mobile as of last year, so you should be fine

Can confirm, typing this on an fp6 on mint. My spouse uses an fp5

Here I thought Linux Mint had made a mobile Linux that runs on the FP6.