When WebOTP API is termed from in an iframe, the SMS textual content message should involve the best-frame origin preceded by @ followed by the OTP preceded by # as well as iframe origin preceded by @ at the last line. Using the WebOTP API, these ways are as easy https://smsmarketingservice28270.anchor-blog.com/13187299/the-fact-about-sms-otp-api-that-no-one-is-suggesting