Writing on phone OTP, WhatsApp, and Indian messaging.
Long-form engineering and product writing from the team building QuickAuth. No fluff, no thought-leadership. Real numbers, real code, real India-shaped problems.
23 posts · 6 topics
LATEST
WhatsApp28 SEPT 20269 minHardik Patel
WhatsApp Business Account banned: what actually works to get it back
Appeals succeed less than 10% of the time, and a generic "please unban me" is auto-rejected. Here is the real appeal path, what to write, how long India decisions take, and what to do while the number is down.
Read the piece →ARCHIVE
- WhatsApp quality rating: the warning you get before the banGreen, amber, red — Meta tells you an account is in trouble days before it restricts it. Here is what moves the rating, how to read it, and how to get a Low rating back to Medium in about a week.Hardik PatelWhatsApp28 SEPT 20268 min
- What an OTP actually costs in India (2026)What an OTP actually costs in India once retries, undelivered sends and DLT are counted — worked through on a real 100k-message month.Hardik PatelAuthentication18 AUG 20268 min
- The cheapest OTP API in India, and why it needs SMS fallbackThe cheapest OTP API in India is rarely the lowest rate card. What actually decides your bill: delivery, retries, and what you pay for undelivered.Hardik PatelAuthentication18 AUG 20267 min
- Interakt alternative in India: what to check before you switchSwitching from Interakt: what to migrate, what breaks, and the checks worth running before you move your WABA and templates across.Hardik PatelWhatsApp18 AUG 20267 min
- AiSensy alternative in India: the two costs a broadcast tool hidesAlmost every Indian WhatsApp platform resells the same Meta pricing. Two invoices differ on message category and on whether you pay for undelivered messages — not on the rate card.Hardik PatelWhatsApp18 AUG 20267 min
- WhatsApp marketing stuck at 60–70% delivery? Here’s the fixA 60–70% delivery rate on WhatsApp marketing campaigns is common — and fixable. Why Meta throttles marketing sends, and how recipient-sticky routing across a WABA pool lifts delivery back up.Shruti PatelWhatsApp31 JUL 20268 min
- WhatsApp broadcast limits in India (2026): how many messages you can really sendWhatsApp broadcast lists cap at 256 contacts and the app throttles you fast. The Business API removes that cap — here are the real messaging-tier limits and how to scale sends safely.Shruti PatelWhatsApp24 JUL 20268 min
- WhatsApp AI assistant: what it can actually do for your businessAn AI assistant on WhatsApp answers customers in natural language, handles orders and hands off to a human when it should. Where AI beats a rules bot, where it does not, and how to deploy one safely.Shruti PatelAI24 JUL 20269 min
- WhatsApp Business API pricing in India (2026): the honest breakdownMeta charges per conversation, not per message, and the category (utility, authentication, marketing) decides the price. The real per-conversation rates, what BSPs add, and how to cut your bill.Shruti PatelWhatsApp24 JUL 202610 min
- Transactional SMS API in India (2026): DLT, routes and how to chooseA transactional SMS API for India means DLT registration, direct operator routes and sub-3s OTP delivery. What separates a good SMS API from a cheap one, and how SMS pairs with WhatsApp fallback.Hardik PatelSMS24 JUL 20268 min
- OTP API in India: how to add phone OTP verification (with examples)What an OTP API does, the send-and-verify flow, and a minimal example — plus the India specifics (SMS DLT, WhatsApp OTP, auto-read, anti-fraud) that decide your delivery.Hardik PatelAuthentication18 JUL 20269 min
- The best Twilio & MSG91 alternative in India for OTP + WhatsAppWhy Indian teams move off Twilio and MSG91 — INR billing, DLT handled for you, and one API for SMS, WhatsApp and voice OTP with fallback. An honest comparison.Hardik PatelAuthentication18 JUL 20268 min
- Running WhatsApp support as a team: shared inbox + CRMOne WhatsApp number, a whole support team. A shared inbox with built-in CRM lets you assign chats, track contacts, and reply in the 24-hour window.Shruti PatelWhatsApp19 JUN 20268 min
- Build a no-code WhatsApp chatbot (with optional AI)Drag-and-drop flows that reply, branch and update your CRM — then add AI only where it helps, with a clean human handoff. No developer required.Shruti PatelWhatsApp19 JUN 20269 min
- How to track WhatsApp template button clicks (the data Meta hides)Meta reports delivered and read on WhatsApp templates but no click data on URL buttons. How a tracked-redirect wrapper recovers per-campaign button attribution.Shruti PatelWhatsApp19 JUN 20267 min
- WhatsApp-first OTP with automatic SMS fallbackSend OTP on WhatsApp first — cheaper, higher-converting, no DLT — then fall back to DLT-registered SMS the moment it fails. How a fallback ladder works.Hardik PatelAuthentication19 JUN 20268 min
- Bulk WhatsApp campaigns that actually get deliveredReach your whole customer list, not just opted-in subscribers, by routing bulk messages through Meta’s utility template lane where content qualifies.Shruti PatelWhatsApp19 JUN 20269 min
- WhatsApp OTP vs SMS OTP in India (2026): cost, deliverability, DLTAt ₹0.115 per delivered auth template, WhatsApp OTP undercuts every Indian SMS route and skips DLT. The honest cost, deliverability and compliance comparison.Hardik PatelAuthentication08 JUN 20268 min
- How to avoid a WhatsApp Business Account ban in IndiaWABA bans trace to three causes: marketing-categorised bulk sends, weak template copy, and flat-rate blasting. How Meta flags accounts — and how to stay green.Shruti PatelWhatsApp08 JUN 20269 min
- DLT registration for SMS in India: the complete 2026 guideEvery business sending SMS in India must register on DLT — entity, header, then template. The full 2026 walkthrough: costs, timelines, and mistakes to avoid.Hardik PatelCompliance08 JUN 202610 min
- Why your WhatsApp utility template got rejected — and how to fix itMeta rejects 30-40% of utility-template submissions — mostly policy mismatches, not real violations. A categorisation-first rewriting playbook with examples.Shruti PatelWhatsApp21 MAY 20267 min
- Android SMS Retriever app-hash: the complete 2026 guideThe SMS Retriever API gives permission-free OTP autofill on Android — once you embed the 11-character app hash. How to compute, embed and test it safely.Hardik PatelAndroid21 MAY 20269 min