Voice verification
Definition
Confirming a phone number by answering an automated call that reads you a one-time code.
Voice verification, explained
Voice verification is the call-based alternative to an SMS code. Instead of texting you, the service places an automated call to the number you entered and reads out a short code, often repeating it, which you then type into the app. It proves the same thing as SMS verification: that you control the number at that moment. Platforms offer it mainly for landlines that cannot receive texts and as a fallback when SMS delivery fails, and they often show the option only after a countdown or a first SMS attempt. To make it work, make sure your phone is not silencing unknown callers and that voicemail does not pick up first. Voice codes carry the same risks as SMS codes, including SIM swaps and scammers who call pretending to need the code back. Legitimate companies never ask you to read a code to them. Noir SMS numbers receive SMS only and cannot answer calls, so choose the text option whenever you verify one of your own accounts with them.
Related terms
SMS verification
Confirming that you control a phone number by entering a code the service texts to it.
Landline number
A fixed-line phone number tied to a home or office connection rather than a mobile phone or SIM.
OTP (one-time password)
A short code that is valid for a single login or verification and expires quickly.
Where you'll meet this term
Can a virtual number receive phone calls?
Some virtual numbers take calls, others are SMS-only. What each type can do, why verification numbers usually can't take calls, and what to use instead.
Read the guide →SMS code vs Voice call verificationSMS code vs voice call verification
Some apps can read your code by phone call instead of texting it. How voice verification differs from SMS, when each works, and why landlines need it.
See the comparison →