Here's what Activision writes about the upcoming release in their press release:
Over the past year, Call of Duty®: Warzone Mobile has been in limited release, gathering feedback, fixing bugs, and continuously optimizing the game to make it one of the best games ever at its worldwide launch. This time with our Limited Release players has proven invaluable with dozens of major updates, thousands of bug fixes, and the addition of new content and features.
Now the time has come and we are excited to announce that this world-class, free-to-play Call of Duty title will be available worldwide on March 21, 2024, on both iOS and Android. Two major maps are available at launch; gear up for the popular Verdansk and Rebirth Island or visit a variety of Multiplayer maps - such as Shipment and Shoot House - and modes, and play the way you want with deep control and accessibility options, plus shared progression where you can level up weapons, XP and more with Call of Duty: Modern Warfare® III and Call of Duty: Warzone, uniting players from across the Call of Duty franchise in a new way for the first time.
At Call of Duty Next, we shared that 45 million players had pre-registered and that we would be releasing the Battle Royale map Rebirth Island at worldwide launch. We can now share that thanks to all the support from fans around the world, we have surpassed 50 million pre-registrations! For those who haven't yet, players who pre-register for Call of Duty: Warzone Mobile will unlock the following rewards for use at worldwide launch:
Join and register for free now by going to callofduty.com/warzonemobile. Additionally, for more info on pre-registration rewards. Read on for additional intel on Call of Duty: Warzone Mobile's features, modes and maps, and expect more news and updates in the coming weeks.
Confirmed: Level Up Across Console, PC
Level up your weapons and XP wherever you are. Call of Duty: Warzone Mobile supports shared progression with the console and PC versions of Call of Duty: Warzone and Modern Warfare III. Just sign in with your Activision ID and most content acquired in Modern Warfare III and Call of Duty: Warzone will transfer seamlessly and remain continuously available between your games.
Common features across platforms include:
Read much more in the full blog post here.