SMS Fallback dramatically improves OTP delivery rates by providing automatic backup when primary WhatsApp channels experience failures. Implementing SMS Fallback addresses India's unique verification challenges patchy internet in smaller cities, diverse device capabilities, and DLT compliance adding complexity to SMS delivery. Topics include A/B testing fallback timing, optimizing tri... https://anantya.ai/blog/sms-fallback-for-whatsapp-otp-india/