Hi Jilong Huang, Thanks for contacting Lebara. To allow us to assist further we need to validate your identity. Please head to https://idvalidation.tpgtelecom.com.au/3049693-7e82d09b-d94a-4af3-9b5c-3ee1d36eee96 within the next 48 hours to complete the verification process. For more information head to https://www.lebara.com.au/support/id_validation TPG telecom operates the Lebara brand in Australia. Thanks, Your Lebara Team.