Tesla Update 2024.2.3 Is Improving Phone Keys By Adding Ultra-Wideband Support (2024)

In Tesla update 2024.2.3, Tesla is rolling out support for ultra-wideband, a wireless protocol that will drastically improve how Tesla phone keys work.

Ultra-wideband (UWB) requires hardware support on the user's phone and the vehicle, so only some of the most recent models will be supported.

What is Ultra-Wide

Ultra-wideband is similar to Bluetooth in that it uses short-range radio waves to enable devices to communicate, although it’s a separate protocol all together. It uses less energy than Bluetooth while providing high-precision location tracking beyond what can be achieved with Bluetooth. The technology is often used to accurately locate devices and determine the precise distance between multiple UWB devices.

Improved Phone Keys

Tesla phone keys are fantastic and give you a way to lock and unlock your vehicle without having to carry a key. They also let you share temporary or permanent keys with others without ever having to hand something over physically. It's one of the ways Tesla can now offer self-serve demo drives without any staff on hand.

While phone keys are great and work reliably most of the time, occasionally the car doesn't recognize that the phone is nearby, requiring you to take out your phone and unlock it or even open the Tesla app before it recognizes that the phone is nearby.

The addition of support for ultra-wideband should solve these issues almost completely by precisely knowing where the phone is in relation to the vehicle. UWB support is also expected to improve other features that rely on knowing your phone’s location, such as selecting the correct driver profile depending on which phone key is closest to the driver’s side.

Enabling UWB Phone Key

The new phone key won’t work out of the box. To use the improved UWB phone key, you’ll need to set it up in the Tesla app. The app will prompt you to “Upgrade Your Phone Key,” and you’ll then need to grant the app access to UWB, which the iPhones call Nearby Interactions. You can remove or check on whether the app has access at any time by navigating to iPhone Settings > Privacy & Security > Nearby Interactions.

Release Notes

Tesla states that its new feature "Ultra-Wideband Phone Key" will improve your phone key due to greater accuracy and better responsibleness.

The release notes read:

"Ultrawide band (UWB) technology is now available for Phone Key. So your vehicle and Phone Key can communicate with greater accuracy to more responsively lock, unlock, and open Automatic Doors.”

“In the Tesla app, choose Phone Key > Upgrade and follow the instructions. After setup, keep your iPhone Settings for Nearby Interactions on for Tesla. Requires iPhone 11+ and Tesla app 4.29.5+."

Cars Supported

Since ultra-wideband requires specific hardware, it can’t be added in a software update unless the hardware is already in the vehicle. Only some of the latest Tesla vehicles appear to support the new wireless protocol.

We have confirmed that the new Model 3 is supported, as well as the 2023 Model X. All refreshed Model S and Model X vehicles include the new UWB frequencies in the certificate of conformity and are likely to receive this feature, but it doesn’t appear to be going out to all new S/X models yet. The Cybertruck is expected to be supported as well.

The first-gen Model 3 and current Model Y unfortunately do not have UWB support.

Phones Support

In addition to the vehicle having support for UWB, the phone must also support it. All models since the iPhone 11 have included support for ultra-wideband. This spans across all models and sizes.

While some Android phones also include UWB hardware, Tesla is launching support for the iPhone first, but we can expect supported Android phones running Android 13 or later to be added at some point in the future as well.

On the Android side, the Pixel 6 and above have support for UWB on the Pro models, while the Galaxy S series phones support the protocol since the S21, but only on the Plus and Ultra models. The Galaxy Z Fold 2 and above also include support as well as other flagship Android phones.

Tesla App Support

Tesla started adding support for ultra-wideband back in July 2023 when Tesla updated their app to v4.23.5 and included references to ultra-wideband. Tesla says that you’ll require the latest Tesla app, v4.29.5 or higher to use the new feature.

Ultra wide-band will bring greater accuracy and reliability to Tesla's phone keys. The phone key is already great and the only thing holding it back is its ability to work reliably 100% of the time, but it looks like that is about to be fixed if you own a new Tesla model.

Tesla's journey towards fully autonomous driving takes another cautious step forward with the release of Full Self-Driving (FSD) Beta version 12.2.1, currently rolling out exclusively to Tesla employees. This latest iteration arrives amidst the backdrop of Tesla's recent earnings call, where the spotlight was on FSD Beta v12's limited release to select customers. However, the exclusivity is to a very limited set of public testers, with many OG testers still waiting to receive any of the v12 releases. It arrives as update 2023.44.30.20 which remains on Tesla’s 2023 holiday update code base, instead of being based on Tesla’s newer 2024.2 updates.

Focused on Fine-Tuning

Through incremental updates, the progression from version 12 to 12.2.1 has been watched on a few Tesla social media accounts. Notably, @WholeMarsCatalog was one of those select customers with access to version 12.1.2. But he doesn’t have the latest version yet.

Fisherman's Wharf to SFO in the Rain with 0 Interventions Required on Tesla Full Self-Driving Beta 12.1.2

Watch in 4K: https://t.co/LwC61XQfmK
Raw 1x speed footage: https://t.co/4Oxcq5LPwf

Highlights
0:01 — Left turn onto Jefferson Street in Fisherman's Wharf
0:52 — Passing… pic.twitter.com/ldDyOwSaz1

— Whole Mars Catalog (@WholeMarsBlog) February 18, 2024

But the small iterations signal Tesla's current emphasis on ironing out the intricacies rather than overhauling features. This could suggest Tesla is nearing a version it feels confident to release more broadly. Each small refinement brings us closer to what many hope will be a future of roads populated by fully autonomous vehicles.

Reality Check on Full Autonomy

Despite the excitement surrounding each FSD Beta release, Tesla hacker Green's insights offer a grounded perspective. According to Green, the expectations of FSD v12 being "fully" end-to-end might be overstated. His analysis, shared via X, points out that while showing significant improvements, recent versions still do not fulfill the lofty expectations of complete autonomy from camera to car controls.

Lots of hype - that's for sure.
Beyond hype? I suspect not much, not like it's going to enable L3, let alone L4.

— green (@greentheonly) February 16, 2024

This revelation tempers expectations, reminding us of the complex road ahead in achieving full self-driving capabilities. Even Elon’s brother, Kimbal, recently stated that fully autonomous driving is five years out. George Hotz, a renowned hacker and someone following autonomous driving technology closely, recently stated that FSD is more than a decade away.

Navigating the Path to Autonomy

The diverging opinions of industry insiders and technology enthusiasts highlight the inherent challenges of achieving full autonomy. While Tesla's approach of incremental improvements through versions like 12.2.1 demonstrates progress, it also underscores the complexity of the task at hand. The insights from figures like Green and observations from the broader tech community serve as a reality check, aligning expectations with the current state of autonomous driving technology.

The speculation around the timeline for achieving full autonomy varies widely and is certainly not in “two weeks.” However, Tesla's ongoing efforts to improve FSD Beta and its strategic approach to development and deployment keep Elon’s dream of fully autonomous driving alive.

February 18, 2024