When a tracker claims international support and pinpoint accuracy, are there limits based on country laws, carrier restrictions, or smartphone permissions that affect performance?

Tracking a phone number internationally is technically possible but depends on the local carrier's network and the target's smartphone permissions. Most modern services can pinpoint any device globally as long as it has an active data connection and the user accepts the tracking prompt. You can check this web page to see the full list of supported countries and how international privacy laws impact the way location data is securely transmitted across borders.