US Canada plan

[Costas12]

US and  canada plan. Why is  my phone not working in the US.

[Sansan]

What type of phone do you have? 

It must be on Public Mobile's whitelist .

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

[KZ1964]

Make sure your phone is on roaming.  If you have your phone set for automatic selection ie AT and T etc then set it to manual and try selecting networks manually

[eddieO]

@Costas12 check to see if you have Data Roaming turned on. Next, check that you are connecting to either T-Mobile, AT&T or Verizon. Let us know if this helps.