We have blocked all requests from this device – Firebase Phone Authentication

Firebase enables apps with Phone Authentication feature but when testing your app you might have received the following error.

We have blocked all requests from this device due to unusual activity. Try again later.

This user usually occurs when you have received too many OTP’s within a short period of time.  And we have to wait for an hour to start using the Phone Authentication feature again.

Recently Firebase has added a feature to add test numbers. This can be found under Firebase Console -> Authentication -> Sign-in method -> Phone

PhoneAuthentication

Now you can use “Phone numbers for testing” section to add test phone numbers. The test numbers will not be blocked and will not affect your testing. I believe you can also use the test numbers for Apple Approval process when publishing your app.


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