A flash call is a near-instant dropped call that is automatically placed to a mobile number, usually as part of an authentication process known as flash call verification. By default, there is no termination fee charge for the call as it is not answered and is simply recorded as a missed call in the phone’s log.
Flash call verification is used as a cost-effective authentication solution and is particularly popular in countries where SMS and mobile phone calls are comparatively expensive.
Flash call verification is a way of authenticating a mobile phone number without the mobile user having to take any action.
It is used when a mobile user is registering for a service, installing an app, or doing anything that requires them to provide a valid mobile phone number to complete the process.
Unlike most conventional 2FA solutions that require the person to sometimes manually enter a code that is sent to them by SMS, the process uses some of the digits from the incoming calling number as the passcode. This is all done programmatically using APIs, so the customer doesn’t have to do anything and will be notified almost immediately that the verification process has been successful.
With the reduced costs of flash call verification businesses can marginally make savings and therefore cover more use cases, including appointment booking, online payments, and even public Wi-Fi connections.
In most cases the process is silent and doesn’t require any action on the part of the user.