Here's a three-bullet point summary of the article, focusing on clarity and conciseness:

- India's government has issued new rules requiring WhatsApp to link user accounts to SIM cards and enforce frequent re-authentication, aiming to combat rising cyber fraud.
- The regulations risk disrupting WhatsApp's functionality and established workflows, particularly impacting the many small businesses in India that rely on WhatsApp Business for commerce.
- These rules directly challenge WhatsApp's recent efforts to expand multi-device capabilities and could hinder the platform’s focus on retaining its large and vital user base in India.