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What is OTP SMS, and how does it work?

One time Password (OTP) is a password that is valid for only one login session or transaction, on a computer system or other digital device. OTP is a string of characters or numbers automatically generated to be used for one single login attempt. It can be send to the user's phone via SMS.

Usecases of OTP are :-

OTP On Call :- Voice-based OTP is a two factor authentication toll that allows business to facilitate missed call based OTP generation for its potential customers.
Transactional SMS :- Send Alerts, OTP, Notification, SMS within 10 seconds anywhere. Transactional routes can only be used for sending transactional SMS such as OTP's and alerts to your registered users.
Promotional SMS :- Send Alerts, OTP, Notification, SMS within 10 seconds anywhere configured by default for all new accounts, promoted SMS is generally used for sending any offers or promotions of new and existing customers.
Methods of delivering the OTP

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