US to Canada calling not working!

[BF76]

I have the $45 plan which includes unlimited Canada and US calling and texts. Data and texts works, but I can't receive or send voice calls. The exception of one day it worked. Being in the US quite frequently, this is very frustrating! Am I doing something wrong? Is there a setting on my phone that needs changing? Any help would be appreciated. 

[DennyCrane · Accepted solution]

If text and data are working, this likely means you don't have a phone that is VoLTE compatible on Public Mobile's network. This is problematic in the US because they shut their 3G networks down a couple years ago, meaning you require a device that is capable of making calls on the LTE network (VoLTE). Which phone are you using?

https://www.publicmobile.ca/en/on/get-help/articles/volte