Overview

• The beta feature lets users set an optional four-digit PIN that must be entered before anyone can start a new chat.
• A new username system allows people to chat without revealing their phone numbers, enhancing anonymity in groups and direct messages.
• Existing contacts can message as usual without entering a PIN since the code applies only to first-time conversations.
• WhatsApp prompts users through in-app banners to adopt the PIN feature, though setting the code remains voluntary.
• Separately, the app now supports seamless use on iPad devices for expanded multitasking capabilities.