What is SMS verification?

SMS verification lets websites, apps, banks, and social networks double-check the identity of a user. After entering your username and password, companies will send an SMS verification code to your smartphone. Use that code to complete your login—this process is SMS verification.

How to verify a user's phone number using smsretriever?

When you are ready to verify the user's phone number, get an instance of the SmsRetrieverClient object, call startSmsRetriever, and attach success and failure listeners to the SMS retrieval task: // SMS message. // (5 minutes). The matching SMS message will be sent via a Broadcast Intent with // action SmsRetriever#SMS_RETRIEVED_ACTION.

How does SMS authentication work?

This form of authentication is actually quite simple. After signing in, the user receives a text message with an SMS authentication code. All they need to do is enter that code on the app or website in question to gain access. You’ve probably experienced this yourself when logging in to Amazon, Facebook, Google, Twitter, and other services.

What does a phone verification server do?

The phone verification server is responsible for three tasks: The With the SMS Retriever API, you can perform SMS-based user verification in your Android app automatically, without requiring the user to manually type verification codes, and without requiring any extra app permissions.