SMS Fallback acts as a backup channel that supports OTP delivery when WhatsApp fails. In India, OTP verification depends heavily on consistent message delivery despite regulatory constraints. Implementing SMS Fallback improves delivery assurance and reduces failed authentication attempts. With platforms such as anantya.ai, businesses benefit from intelligent routing where SMS Fallback... https://anantya.ai/blog/sms-fallback-for-whatsapp-otp-india/