https://www.smsgatewaycenter.com/multi-channel-fallback/ https://i.ytimg.com/vi/hMH6IRYd5KM/maxresdefault.jpg OTP SMS Didn't Arrive? Auto-Resend on WhatsApp or RCS When an OTP SMS doesn't arrive, users leave. SMSGatewayCenter's Multi-Channel Fallback retries the same message on the next channel automatically: SMS, then WhatsApp, then RCS, in the order you set. One approved template per channel, with variable mapping so the same OTP appears everywhere. Fail over on any error, or only on the error codes you pick (for example DND or timeout). Every attempt shows in Message History, plus Failover Analytics. Host character, animation and voice are AI-generated. https://www.youtube.com/embed/hMH6IRYd5KM 34 2026-10-21T08:01:41-07:00 yes SMS Gateway Center no https://www.smsgatewaycenter.com/integrated-otp-sms/ https://i.ytimg.com/vi/Ia19tttU9t8/maxresdefault.jpg Stop Building Your Own OTP Logic: Generate + Verify OTP API Generating, storing, expiring and checking OTPs yourself means four moving parts to maintain. With the SMSGatewayCenter OTP API you make two calls. First, sendMethod=generate creates the OTP and sends it by SMS, with the code length, type (numeric, alpha, alphanumeric) and expiry (default 300 seconds) set by you. Second, sendMethod=verify checks the code your user typed and returns success or failure. In India, OTP SMS needs an approved sender ID and a DLT-registered template. Host character, animation and voice are AI-generated. https://www.youtube.com/embed/Ia19tttU9t8 46 2026-10-17T09:21:09-07:00 yes SMS Gateway Center no