Best answer by pikeviewer2
The Mint Mobile co-founder asked for feedback about this on the Mint Reddit forum. I have the same problem intermittently and sent him an email yesterday. To his credit, he replied quickly but seems to think the problem is mostly with the Moto G5+ phones (which I have). What phone do you have?
I suggest that you send him an email as well. Here is his request:
Can you email me at reddit-rizzy at com.mintmobile (reversed of course) Device you use (exact model number or IMEI) MSISDN/phone number Do your incoming calls always or sometimes go to voicemail? If sometimes… Does it work sometimes and not others at the same location? Does it happen more at a particular location? Does it happen at certain times more? Do you get a voicemail notification? What about a missed call notification? How often (what % of calls) is sometimes? When did it start? What was the last time it happened? Can you provide 2-3 times it happened recently (incoming number and phone number?) Does your phone show you using LTE? Do you have VoLTE enabled? WiFi Calling?