Blizzard Entertainment has opened pre-registration on iOS for their upcoming free to play mobile RPG Diablo Immortal. A new trailer shows the cosmetics to be earned by pre-ordering. Android players on the other hand can still pre-register.

Pre-Order Rewards

Since yesterday, iOS users can pre-order Diablo Immortal on their devices from the App Store. If at least 30 million players pre-register to download the game, then the Horadrim Cosmetic set will be unlocked for all, provided they complete the Diablo Immortal tutorial within 30 days after the game’s release.
Modeled after the Brotherhood of the Horadrim, an ancient collective of mages and wizards selected by archangel Tyrael, the Horadrim Cosmetic set can morph and create a distinctive look for each class.

Android pre-registration: https://play.google.com/store/apps/details?id=com.blizzard.diablo.immortal
iOS pre-registration: https://apps.apple.com/app/diablo-immortal/id1492005122