Firebase SMS

From the use of firebase OTP verification using a phone number is FREE. The free plan of firebase has Ten Thousand Verification per month , but if you exceed this limit, you need to pay for that.1 Eyl 2021

After clicking on the verify button Firebase will verify that OTP and allow the user to enter into the home screen only when entered OTP is correct else the user will get an error message.23 Tem 2021

All other Firebase Auth features are no-cost on all plans . Prices are per successful verification. … All other Firebase Auth features are no-cost on all plans.