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Firebase Authentication Via Phone Number Sign-in Service

In my application I am going with a functionality, in which i need to authorize user's mobile number via OTP.

So, for this i need to authentic mobile number via OTP Call using Firebase Service. Currently I am doing research but, not able to find any solution regarding OTP Verification via call with Firebase.

I have already implemented this functionality using Firebase Authentication phone number sign-in service with SMS verification method.

Any source/help would be appreciated.

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Answer

Currently firebase does not provide OTP over call, you'll have to use only SMS OTP service or look for other OTP over call service providers like twilio or nexmo Note: I haven't tried any of these. I just Googled for OTP over call service providers. Please search before you select one.

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source: stackoverflow.com
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