Features User Experience Integration with AI User Interaction User Engagement Event Coordination Video Calling Features Contact Management User Privacy Group Call Limitations Voice Message Transcripts Voice Message Transcription Voice Messaging User Features Outages Calling Features Video Calls Text Messaging AI Chatbots ChatGPT ChatGPT Integration Chatbots ChatGPT Features Security Risks Service Outage User Issues Boris Johnson's Phone Disappeared Messages Data Loss Missing Messages Message Deletion Commercial Outage Group Messaging User Growth User Adoption