A look at the opportunities and challenges of ultra-wideband, as UWB beacons see widespread adoption in smartphones, smartwatches, and other devices
The ultra-wideband, or UWB, technology that powers Apple's AirTags could reshape how we interact with devices—if companies can overcome privacy concerns and other hurdles Tweets: @wsj and @stevemur Tweets: @wsj : For all the attention on tech companies and location tracking in recent years, our gadgets are actually surprisingly bad at knowing precisely where they are at any given moment. That's about to change. https://www.wsj.com/... @stevemur : Some of the biggest leaps in technology on deck require vendors to agree on how to chat with one another. Example: Cars which can platoon, to allow for more complete self-driving. Another, easier to achieve example: Ultra Wide Band (UWB): https://www.wsj.com/...
Context & Ripple Effects
UWB's path to ubiquity started with Apple quietly shipping the U1 ultra-wideband chip in every iPhone 11 for spatial awareness, initially used only for AirDrop but flagged at the time as groundwork for tracking tags. That groundwork became AirTags, and Samsung answered with its own $40 SmartTag+ combining Bluetooth, UWB, and AR guidance — turning precise short-range location into a two-horse consumer category.
First-order effects
- With UWB beacons now spreading across smartphones, smartwatches, and other devices, every major phone maker is effectively shipping a precision-location radio by default, making item tracking a built-in platform feature rather than an accessory market.
Second-order effects
- Apple's continued investment — culminating in the second-gen Ultra Wideband chip in the iPhone 15 that adds precision finding with distance indicators in crowded venues — pressures Samsung and other Android vendors to match hardware-level spatial awareness or cede the Find My-style ecosystem lock-in.
Third-order effects
- The open question the WSJ reporting flags is whether vendors can agree on cross-device standards; if they do, UWB becomes shared infrastructure for car access, device handoff, and proximity services, but if privacy concerns go unaddressed, regulators may treat precise location as the next tracking battleground.
The trend: Ultra-wideband is moving from a single-chip experiment in the iPhone 11 to default radio hardware across consumer devices, with interoperability standards and privacy rules deciding whether it becomes shared infrastructure or fragmented ecosystems.