Step 1 : Get the phone number through input from the user.
Step 2 : Pass this phone number to the firebase and receive a callback with verification ID.
Step 3 : Pass on this verification ID through navParams
to the next page where the user will enter the OTP sent to the entered mobile number.
Step 4 : Verify the OTP that is sent with firebase for success()
or failure()
.
phone-verification.html