Well I know my friend who has phone through me has that issue and when I pay the bill there’s no extra charges as check the bill regularly and I get notified when she’s “roaming”
As long as you don’t use your phone when that ping goes off (answer phone calls or text or use internet) it won’t charge you. I’ve asked this question to customer service before as in sooke, BC there’s a section of west coast road that pings to the U...