Have you ever counted the number of digits in your mobile phone number?

你数过你的手机号码有多少位吗？

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Sign up with your mobile phone number, then set a password.

用你的手机号码注册，然后设置密码。

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Provide the MSISDN number and user agent for your mobile phone.

为您的移动电话提供MSISDN数字和用户代理人。

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And at the heart of it is a powerful idea - that your mobile phone number can become the key to your bank account without you having to hand over your banking details to anyone who wants to pay you.

BBC: Mobile money - has its moment come?

You enter your mobile number, a PIN number will be sent via text to your phone, and you then enter the pin on the Web site to see confirmation of all donations you have made via that phone number.

FORBES: Charitable Giving

To sign up, simply head over to the "Phone and SMS" settings page in Gmail, add your mobile number and complete a verification process.

ENGADGET: Google launches Gmail SMS for text-based email in Ghana, Nigeria and Kenya