![](/images/html5based.png)
Cases:
![](/images/cases6.png)
A call with a password is an authorization service by phone number.
Increase the number of registrations by 20%! In 20% of cases,
the subscriber does not receive an SMS,
or it comes with a strong delay.
Calls always go through - add them
to SMS and increase conversion by 20%!
Calls are twice as cheap as SMS.
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