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Can I use number authentication when connected to a Wi-Fi network only?

Yes, you can use number authentication when connected to a Wi-Fi network. Number authentication, often referring to SMS-based one-time passwords (OTPs) or similar methods, can be utilized over Wi-Fi connections to verify a user's identity.

Explanation:
Number authentication typically involves sending a verification code via SMS to the user's registered mobile number. This method does not strictly require an internet connection beyond the initial Wi-Fi setup to receive the SMS. Once connected to Wi-Fi, the user can open the authentication app or enter the received code to complete the verification process.

Example:
Imagine you're at a coffee shop and want to access your online banking app securely. You connect to the coffee shop's Wi-Fi network. When you initiate a transaction that requires authentication, the bank sends an SMS with a one-time code to your registered mobile number. You receive this SMS over the Wi-Fi network (assuming your phone has data disabled or you prefer not to use it for security reasons), and then you enter this code into the app to authenticate.

Cloud Service Recommendation:
For businesses looking to implement robust number authentication services, Tencent Cloud offers solutions like Tencent Cloud Authentication. This service provides a secure and convenient way to verify user identities through SMS, voice calls, or other methods, integrating seamlessly with various applications and services.