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That really doesn’t sound like the ideal UX they should be going for. It should either sense and unlock immediately, or the car should (optionally) sense your Watch approaching and unlock before you get there. Not sure which technology is used for that (UWB/NFC/Bluetooth), but hopefully that becomes how it works.
That technology is UWB as it uses time-of-flight to very accurately sense your position. Unfortunately, as I mentioned a few posts above, that technology is not yet widely deployed in vehicles, although a small number of cars do support it. The other issue with UWB is that it’s not yet particularly common in Android phones, as most wifi chipsets up until very recently did not support it thus requiring phone makers to install a dedicated UWB chip in their handsets to provide support for it.

Bluetooth 6 which was just announced a few weeks ago also added time-of-flight features but it will take years before it‘s widely adopted.
 
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Any chance this could be used to help with the numerous car thefts occuring daily in my city?
In the future, yes, but it really depends on what methods the thieves are using to steal cars. It won’t help older cars that lack engine immobilizers like many older Hyundai/Kia models. It also won’t help protect cars that use older wireless keyfobs that lack relay-attack protection circuitry.
 
Could expand to rentals??? Like, this should already be a thing. No more physical keys to manage or lose. The auto industry as a whole, and subsequently the auto rental industry, are really lagging on the tech. Meanwhile Tesla, Rivian, Mercedes, BMW and Ford all offer phone as a key options on many vehicles — all current vehicles from Tesla & Rivian.

My car's key fob has a pull out blade key for when the battery dies, and it can still be used to start the engine by holding the key fob next to the start button.

What's the backup for digital keys in a phone when it stops working if you didn't bring a physical key/key fob? (*crickets*)
The fears about how this works if the phone key fails…. Well, yes, that’s a possibility, but the brands mentioned above all show that it works just fine. And lost keys in the rental business and/or keys being locked in cars, is already a huge problem.

But what would the backup be For a serious solution — keycode/password. My F-150 that I bought 2 years ago uses my phone as a key. But I can lock/unlock the truck from the exterior keypad and I can start and drive the truck without a key or my phone by using the password function on the infotainment system. I can also set a 5-digit PIN for service or valet so they can just use the code to do everything and i don’t have to leave them with a physical key.

Now imagine if the automakers put this on all their rental fleet vehicles and there was a standardized gateway or system to remotely manage. Oh, you lost or broke your phone? Here, we’ll transfer the key to a new one. Or if you can access, your rental confirmation email has the codes to operate the vehicle, etc….

”but what if there’s no power or this fails?” Well, you got me there, call roadside and have them swap out with a new car that works. Because you rented a vehicle and you expected it to work. And no power, whatever, doesn’t leave you in a better situation if you have a fob. You may have a fob with a mechanical key to open a door so you can sit in the car while you wait. But that’s it…. Oh, but wait, some keyless entry systems maintain a charge so you can at least unlock and open the driver’s door a time or two even with no vehicle power.

No *crickets* here…. This tech is already built into many newer cars. The only thing lacking is a system where rental companies could remotely manage multiple brands of vehicles from their own system.

….And the comment from this guy about “some hotels” already offering this feature. Like, WTF? I would argue that the majority of any decent to nice hotels have implemented digital phone keys at this point. It’s actually weird and unusual to a stay at a hotel that doesn’t have this and I travel a lot. Going no-contact during covid was a huge catalyst for this change in the hotel industry.
 
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Could expand to rentals??? Like, this should already be a thing. No more physical keys to manage or lose. The auto industry as a whole, and subsequently the auto rental industry, are really lagging on the tech. Meanwhile Tesla, Rivian, Mercedes, BMW and Ford all offer phone as a key options on many vehicles — all current vehicles from Tesla & Rivian.


The fears about how this works if the phone key fails…. Well, yes, that’s a possibility, but the brands mentioned above all show that it works just fine. And lost keys in the rental business and/or keys being locked in cars, is already a huge problem.

But what would the backup be For a serious solution — keycode/password. My F-150 that I bought 2 years ago uses my phone as a key. But I can lock/unlock the truck from the exterior keypad and I can start and drive the truck without a key or my phone by using the password function on the infotainment system. I can also set a 5-digit PIN for service or valet so they can just use the code to do everything and i don’t have to leave them with a physical key.

Now imagine if the automakers put this on all their rental fleet vehicles and there was a standardized gateway or system to remotely manage. Oh, you lost or broke your phone? Here, we’ll transfer the key to a new one. Or if you can access, your rental confirmation email has the codes to operate the vehicle, etc….

”but what if there’s no power or this fails?” Well, you got me there, call roadside and have them swap out with a new car that works. Because you rented a vehicle and you expected it to work. And no power, whatever, doesn’t leave you in a better situation if you have a fob. You may have a fob with a mechanical key to open a door so you can sit in the car while you wait. But that’s it…. Oh, but wait, some keyless entry systems maintain a charge so you can at least unlock and open the driver’s door a time or two even with no vehicle power.

No *crickets* here…. This tech is already built into many newer cars. The only thing lacking is a system where rental companies could remotely manage multiple brands of vehicles from their own system.

….And the comment from this guy about “some hotels” already offering this feature. Like, WTF? I would argue that the majority of any decent to nice hotels have implemented digital phone keys at this point. It’s actually weird and unusual to a stay at a hotel that doesn’t have this and I travel a lot. Going no-contact during covid was a huge catalyst for this change in the hotel industry.
Some Hyundai vehicles can be unlocked using biometrics.
 
It was really the outdated credit card terminals that was the issue. Retailers didn't want to buy new terminals that supported NFC when they saw little to no benefit. However, after the US finally switched in earnest to credit card chips, due to the responsibility for fraud flipping over to being the retailers problem if they swiped the card, that essentially forced retailers to update their terminals. And NFC was a side benefit of the newer terminals.
YES! It has taken, many, many years. A decade?? Anyhow, at least now in the shops I go to, they ALL take NFC.
 
A few years ago I was hiking and my phone got wet when I accidentally left it in my pocket while crossing a thigh deep river. Needless to say that was the end of that phone. So your point is well made.
Not for nothing, but modern iPhones are totally capable of withstanding such a dunking. I waded right into a swimming pool a couple summers ago with my iPhone 12 Mini in my bathing suit shorts pocket and the only issue is that it (prudently) refused to charge via the Lightning port until it had dried off for a while. And I think newer iPhones have even better water resistance now.

(And yes, there are still a million other ways to kill or lose an iPhone so I get the larger point about needing redundancy.)
 
There's obvious value for a subset of users and I imagine adoption similar to hotels where the majority still use keycards and a subset enjoy the digital option but you always need that physical fall back system to be available. Replacing keys seems very unlikely until society mass adopts digital. Supplementing keys (where you take the key but have the digital option) seems more likely.

Now - here's a priority I wish they'd put ahead: valet digital keys! The biggest shortcoming of digital keys at the moment is that you become so used to it, that you forget when you need a physical key. I always bring physical keys on road trips as I'm worried about software issues, but when I'm home I never bring them which has caused issues in valet parking scenarios or when bringing to the dealership for service. It would be nice to be able to send a temporary key that expires at a set time (and has a max permission level), and has limited permissions.

Overall though I've been really happy with digital keys. We have a 2024 BMW iX so it uses the UWB version of digital keys which starts unlocking as I walk up to the car and I've never had issues with it.
 
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