When you enter your phone number on a website or app that uses flash call 2FA, you will receive an automated call from the service. The website or the app will ask you to enter a PIN or confirm your identity in some other way.The PIN is usually the phone number that called you or the last4-6 digits of the phone number that called you. Once you've done so, you will be able to access the service.

Flash calls are a convenient and secure way to add an extra layer of protection to your online accounts. They're also quick and easy to set up - usually, all you need is a phone number. So if you're looking for a secure and convenient 2FA option, flash call may be the right choice for you.

FlashCall is 60% cheaper than SMS, it’s faster and much more reliable.

Using the flash caller technology from Authenticalls will allow you to save up to 60% from your authentication budget and stay safe against data breaches.