But what is Call of Duty: Mobile? Is it a conversion of one of the console/PC CODs? Or is it a standalone game designed just for smartphones?
Find out in our handy guide to the new game from Activision.
What is COD: Mobile?
Call of Duty: Mobile was announced in March 2019, with publisher Activision announcing that it would like to develop more smartphone games in future.
It is being developed by Tencent studio Timi, which has experience in creating multiplayer online games for mobile platforms.
At present, all announced modes are player-versus-player (PVP) - including battle royale. However, Activision has revealed that the game will not not be exclusively multiplayer, with additional modes of play to be announced at a later date.
We do know though that the majority of play will be on maps and with characters and weapons that have appeared in multiple Call of Duty titles over the years, including the Modern Warfare and Black Ops series.
It will be available on Android and iOS. You can pre-register to receive the Android app on launch here. Apple iPhone owners can also pre-register their interest on the dedicated COD: Mobile website here.
When will Call of Duty: Mobile be available?
A closed beta - or soft launch - of COD: Mobile is currently underway in India, Canada and Australia.
Beta sessions in other regions are likely, but it shouldn't be too long before the full release will be available anyway. The publisher quoted "summer" for global release when it was first announced, but now says that it will be available in the "coming months".
How much will it cost?
Call of Duty: Mobile will be free-to-play with in-app purchases for in-game items. Activision says that you'll be able to play the whole game free, using either credits that you earn in the game to level-up, as well as supporting CoD points that you'll buy with real cash.
Like other games in the genre - PUBG Mobile for example - you'll be able to get skins and additions for weapons using credits, with access to items opening up as you level up. You can use CoD points to skip some of the tiers to provide access more directly.
There will be a free Battle Pass as well as a Premium Battle Pass.
What gameplay modes will be available?
The first set of gameplay modes, as available in the beta test version, are all multiplayer and are fan favourites.
You will be able to pick between three types of match: normal, ranked or private, depending on the other players you wish to face off against. Ranked matches will reward XP and other items).
The multiplayer gameplay modes to be announced so far are Free-For-All, Frontline, Hardpoint, Domination and, of course, Team Deathmatch.
All are team-based, with two competing teams of five players, bar Free-For-All which is, as the name suggests, every player fighting for him or herself. This latter mode allows for a maximum of eight players in one match.
How will Call of Duty: Mobile Battle Royale work?
Activision has detailed some of the key features of its extra Battle Royale mode. It is being custom-built for the mobile game and, while there are some similarities with Blackout, it will be unique to the series.
Matches will host up to 100 players on the same map, with single, two-person and four-person playlists being tested. That means you will be able to play solo, two-player and in teams of four.
Like Blackout, you drop from above the map and must battle to be the last person standing. If you are in a team, you can revive teammates, who drop back into play once healed.
There are different character classes to choose from before a round: Defender, Mechanic, Scout, Clown, Medic or Ninja. Each has an individual ability to call upon.
There will also be vehicles to drive in Battle Royale, including an ATV, light helicopter, SUV and a tactical raft. These could help you more quickly avoid the ever-decreasing circle of death as the game progresses.
Perhaps the most important difference between Battle Royale and the other multiplayer modes is that you can also play using a third-person perspective as well as the traditional first-person. As there are some benefits to this, the choice must be made before a match so you all players you face use the same viewpoint throughout each game.
What maps will be available in Call of Duty: Mobile?
Some of the best-loved multiplayer maps from the COD series will be available in Call of Duty: Mobile.
These include Nuketown from Black Ops, Crash from the Modern Warfare series, and Hijacked from Black Ops 2.
More are being announced all the while, with a further seven being revealed on 16 May. Also from Modern Warfare, you will be able to play on Crossfire and Killhouse. The reworked Firing Range from Black Ops 4 will be available. And, Standoff from Black Ops 2 is on the list.
All of these maps are true fan faves.
The COD: Mobile Battle Royale map will be made up of elements from across multiple Call of Duty games; taken from the Modern Warfare and Black Ops series.
Can I play as different Call of Duty characters in the mobile game?
As well as the different classes in Battle Royale mode, characters from across the COD games will be available to play as in the other game modes, with customisation of loadouts, headgear, backpacks and clothing possible.
Activision has so far announced that Alex Mason and David "Section" Mason, from the Black Ops series, will both be available. Modern Warfare fans might want to play as John "Soap" McTavish, Simon "Ghost" Riley or John Price. While a Call of Duty: Ghosts character also returns, in the guise of Thomas A. Merrick.
More will be revealed in time.
Will there be Scorestreaks and loadouts?
As with all recent Call of Duty games, there will be Scorestreaks and loadouts in Call of Duty: Mobile.
Scorestreaks are unlockable (through XP) accessories you can use at points in your matches. Up to three can be assigned to your character before you enter a match.
Those announced so far include the Recon Car, UAV, Hunter Killer Drone, Air Supply Drop, Counter UAV, Missile Strike, Drone, Sentry Gun, SAM Turret, Stealth Chopper and VTOL.
A pre-match loadout menu will also be available for you to change what weapons to assign to your character before battles.
Weapons themselves can also be customised - aesthetically through skins or with attachments that will alter their in-game properties.
You will be able to take primary and secondary weapons into a match, plus a grenade (explosive or tactical), plus a weapon skill between the (currently announced) following: Purifier (flamethrower), War Machine (grenade launcher), Death Machine (minigun), Transform Shield (deformable shield), Sparrow (bow), and Tempest (electrical bolt rifle).
Perks can also be assigned, each of which offering different abilities, including Fast Recover to improve health regeneration speeds, and Demo Expert to improve your explosives damage. Up to three of those can be assigned too.
There will be five loadout slots per character, so you can chop and change them without needing to fill them in each time.
Call of Duty: Mobile more information
You can find out more information about the game from the official website here.