Everything to know before putting your car key on an Android phone - Engadget

Android digital car keys, supported since Android 12, store a digital copy of a car key in Google Wallet and control the vehicle over a secure wireless connection. Unlocking the car is available at minimum, while additional functions depend on the vehicle maker, including the ability to start remotely in some cases. Because the key is digital data tied to the vehicle, it can be shared with other phones through a simple text message, including iOS devices. The underlying approach builds on the Car Connectivity Consortium’s Digital Key standard introduced in 2018, later updated for today’s smartphone implementations.

"Android's support for digital car keys means that if your phone and car are compatible, you can use Google Wallet to unlock your vehicle, and, in some cases, even start it remotely. Knowing how the feature works and which smartphones support it will not only make the feature easier to set up, but it could keep you and your car safer in the long run."

"Google added support for digital car keys with the release of Android 12 in 2021, one year after Apple brought its version of the same idea, CarKey, to iOS. Both let you store a digital copy of your car key in your default wallet app (Google Wallet, for Android devices) and control your car over a secure wireless connection. What extra functions are available to you depends on each vehicle's maker, but the ability to unlock your car comes at a minimum."

"Because this smartphone key is entirely digital, and basically a representation of data associated with your car, it can also be shared with other phones via a simple text message. That's even including iOS devices. While digital car keys are a relatively recent addition in the grand scheme of smartphone features, the concept was in the works for several years before even Apple and Google hopped on board."

"The Car Connectivity Consortium, an industry group representing car and electronics companies, introduced its first "Digital Key" standard all the way back in 2018. The version of digital car keys available on smartphones today is built on an updated version of that same standard."

Read at Engadget