Pre-register for Asphalt 9: Legends on Google Play Store and earn extra rewards
Although Asphalt 9: Legends is not yet available on Android, beta or otherwise, fans of the platform can now pre-register on Google Play Store to be notified when the game goes live. But it's not just that, as Gameloft offers free pre-registration bonuses to Android players, which will be unlocked every week until the game is released.
Sadly, these bonuses haven't been revealed yet, so you'll have to check the game's official website every week. It's worth noting that the graphics on the Asphalt 9: Legends site shows there will be four free bonuses offered to Android users over the span of four weeks, which basically means that the game will be released in early August.
The free bonuses are unlocked when enough people pre-register for the game, so you might want to spread the word in order to earn extra rewards at launch. Also, it looks like the first week's bonus includes tens of thousands of credits that you'll be using to upgrade your cars, but it hasn't been fully unlocked yet (currently at 85%).