SIM card number:
PUK number:
Any 2 frequently dialed numbers: （任意2个经常拨打的号码）
Last top up date/amount:（上一次充值的时间，金额）
Date of birth (Required):（出生日期，之前在官网注册时填的）
过了一会收到客服邮件，貌似成功了。
Thank you for your email and passing the security questions.
We are happy to assist you in regards with deactivating your voicemail.
Further to your email, we would like to inform that we have successfully disabled your voicemail.
We advise you to restart your handset.
