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/3049693-1a1b0163-f12d-4a55-a1a1-d7621fd73210 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.