WhatsApp is apparently working on a Flash Call feature that will allow users to swiftly connect to their accounts. A 6-digit code is delivered to a user's phone for verification when they try to log in to WhatsApp. A new alternative approach is being created, according to reports, in which WhatsApp would make a flash call to the user for verification purposes. This will allow users to log in faster than with SMS verification, and it should be handy once multi-device support is implemented, allowing users to log in to many devices at the same time.
WABetaInfo, a WhatsApp features tracker, has released further information regarding the flash call function, which was initially noticed in WhatsApp beta version 2.21.11.7. “WhatsApp will call your phone number and then automatically finish the call, checking that the last phone number in your phone's log is the same as the number that gives you the 6-digit code,” according to this approach. There is no way to fool this system because the phone number is always changed, assuring a safe experience,” WABetaInfo claims.
WhatsApp would apparently ask the user for permission to make and handle calls, as well as read the phone's record, in order for this function to work. WhatsApp is allegedly working on a feature introduction to explain why it requires these permissions. According to WABetaInfo, WhatsApp will not use your call history for any other purpose. It will only check the most recent item in your call history with the phone number that is meant to call you, and it will not be utilised for any other purposes.
Furthermore, according to the features tracker, the flash call function will not be deployed on WhatsApp for iOS because Apple does not provide a public API for reading call history. This functionality is also optional, and users can continue to log into WhatsApp after verifying the 6-digit code obtained via SMS or phone call. This feature is still in development and is not available in beta.