More than likely, you can’t pay for Disney+ because your physical device location and your payment method location don’t match. You’ve likely encountered this error message:
Unable to subscribe:
Your payment method does not match the country from where you are signing up. Please change your payment method to match that country.
If you’re traveling abroad temporarily, a VPN can help mask your device’s IP address. ExpressVPN uses high-level encryption to hide your IP address and replaces it with an IP address from its global server network. This way, you can make your device appear to be in your home country (where you have a matching payment method).