SMS Verification Guides

Guides that explain what SMS verification is, how it works and where it is used.

How to Choose an SMS Verification Service

The price, refund, payment and support checks to run before paying an SMS verification service, plus the promises to be wary of.

What an OTP code is, how it reaches you, what to do with OTP texts you didn't ask for and how it relates to two-factor authentication.

Get numbers, read verification codes and cancel orders through the Onay360 API, with sample code, rate limits and key security tips.

Quick checks for your own number, options when it won't work and the steps to get codes on a virtual number with Recommended countries.

The two meanings of SMS verification, how a verification code works behind the scenes and how an SMS verification service works step by step.