# Cal.com v4.4.9 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v4.4.9
- **Released:** Sep 12, 2024
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v4.4.9/

## Executive Summary (TL;DR)
Cal.com v4.4.9. Source highlight: fix: API V1 slots add explicit orgSlug null fallback

## New Features
- feat: booking with phone number
- feat: update v2 calendar services logic to handle multiple calendars
- feat: update translations
- feat: Implement Dub.co for conversion tracking

## Bug Fixes
- fix: API V1 slots add explicit orgSlug null fallback
- fix: availability/[schedule]
- fix(ally): changed unsemantic button
- fix: (managed-event-booking): slug conflict handling
- fix: profile page flickering and refactor
- fix: use current user email