Pay As You Go roaming credit can be used for standard internationals calls, text and data usage when you are outside of Australia. Usage is charged at pay-as-you-go roaming rates, which may differ from destination to destination. Please check your roaming rates before travelling. International Roaming credit expires 30 days after purchase. Unused credit will rollover to your next International roaming credit purchase, up to $500, if you purchase additional credit before expiry.