Why is the verification code a telephone notification?

Many softwares collect verification codes in two ways, one is SMS verification code and the other is voice verification code.

Voice verification code is the verification code content of fixed-line broadcast, which can avoid the blind spots of short messages such as blacklist; In fact, voice verification code and SMS verification code are similar, both of which are used to verify the identity of users, and they complement each other. It can also be said that voice verification code is a substitute for SMS verification code. When the SMS verification code is not sent in place, voice verification code can be used to supplement the transmission to prevent users from receiving the verification code.

For some security needs, such as the financial industry, the probability of using voice verification code is higher.

Voice verification code can prevent the phone from being swiped, and voice information is not easy to be stolen, which is more secure.