The WhatsApp Service Message Change on October 1: The Final Checklist
Almost every article about the WhatsApp service message change on October 1 is about the money. For a typical Indian SMB the money is small. The thing that can actually break your business is the 30 September payment method deadline: an account without a card on file stops having its replies delivered, with no bounce and no error in the inbox. This is the short version for anyone who did not run a four-week plan, ordered by payback per minute: the ten-minute Billing Hub check, the confirmed India rates, the 1,000-message allowance that providers report but Meta does not publish, worked costs at three real volumes, and the three fixes that fit in one morning.