Verify will now always fallback from WhatsApp to SMS to ensure that your OTP gets delivered.

This is an enhancement for Twilio Verify customers requesting that a One-Time Password (OTP) message be sent via WhatsApp. We continuously monitor the availability of the WhatsApp channel, and will now automatically send your OTP message via SMS as a fallback in the event of an outage, degradation, destination country/region unavailability, or missing/misconfigured WhatsApp Sender. This fallback will only occur if you have enabled the SMS channel and the message will be billed as if you had requested an SMS in the first place. This fallback will be enabled on April 24, 2025 for all customers by default, but you can opt-out here at anytime. For more details, refer to the documentation here.