Google virtual phone is bound to bank card.

Google's virtual mobile phone needs to register an American AppleID-bound bank card. Google Voice is an independent American phone number, through which you can manage all your mobile phone numbers, phone numbers, voice mails, text messages and so on. It's free to answer and make calls to the United States/Canada, and it's also free to send short messages to the United States/Canada numbers. After Google Voice was acquired by Google, it kept many original services of GrandCentral and added some new functions. Many people need an American Apple account to download some applications, while American bank cards, American phone numbers and Google virtual phone numbers are better than many disposable phone numbers to register American Apple accounts.