Imagine being able to get the precise location and direction to your keys or TWS earbuds when they lie concealed underneath your sofa cushion? Or to get help navigating to specific stores within a crowded mall? Or the option to securely unlock your car or office door as you approach it. That’s what the Ultra-wideband or UWB technology on phones can help accomplish.

Apart from being the first phone to include a true variable refresh rate display, Samsung Galaxy Note 20 is also the first Android phone to include UWB technology that can potentially change how we interact with smart IoT devices.

Apple’s iPhone 11 already has it and since OEMs like Samsung, Sony, Xiaomi, and more are already associated with Fira consortium that’s working on the development and widespread adoption of UWB, more flagships are likely to include Ultra-wideband connectivity in 2021. 

Apple has also quietly added U1 Ultra wide-band Locator chip to the Apple Watch Series-6, which should make them easily discoverable and users will perhaps be able to unlock doors without even pulling their phones out of their pockets.

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Also Read: What is LTPO Display?

What is Ultra-Wideband technology?

Ultra-wideband technology is about getting a very precise location in a very short time and doing so in a secure manner. GPS can lead you to your home, but what if you need directions to an object lying within your home? That’s how precise Ultra-wideband connectivity can be while consuming less power than Bluetooth and Wi-Fi. 

How does Ultra-Wideband technology work?

The technology has been around for more than a century, but it’s now finding popular use cases with IoT devices. UWB in our phones is actually IR UWB or Impulse radio Ultra-wideband. It involves pushing wide 500MHz(or greater) radio wave pulses at very high frequency (intervals around 2 nanoseconds) and then measures the time of flight (round trip time for the signal to travel between two UWB devices). 

Also Read: What is Nearby Share? How does it work?

UWB can determine distance accurately to within a few centimeters and it also uses angle-of-arrival (AoA) technology to indicate the precise direction of the signal. If your car supports UWB unlocking, it will be able to seamlessly unlock the exact door you are approaching. 

What are Ultra-wideband technology use cases?

Such precise location tracking obviously opens a wealth of use cases. Apart from indoor navigating and finding lost objects, UWB can make IoT devices recognize your presence. Your audio system would recognize which room you are in or light bulbs could glow automatically as you enter a room. 

UWB can also be used for handsfree payments when you approach a ticket counter, or for smart cars of the future to verify your credentials. 

Fima consortium classifies potential use cases under three segments:

Seamless Access Control – These include UWB-based solutions that track your approach, verifies your security credentials, and then let you pass through.

Location-Based Services – These include applications resulting from highly precise positioning, even in crowded environments.

Source: NXP

Device-to-Device (Peer-to-Peer) Services – These involves uses cases where two UWB devices communicate with each other (AIrdrop, Nearby share) or track each other. “People with mobile phones could locate each other with precision, parents won’t lose track of their children, and rideshare customers would find their driver in a sea of vehicles.”

On the downside, UWB connectivity will also expose users to targeted advertising or precise location tracking could compromise user privacy. This is why Apple added an option to disable its U1 UWB chip altogether. 

How does Samsung Galaxy Note20 Ultra use UWB connectivity?

Right now both Samsung Galaxy Note 20 Ultra and Apple iPhone 11 use UWB to enhance file sharing via Airdrop and Nearby-share respectively.

Samsung has worked closely with Google to get UWB on Note 20 Ultra integrated with Nearby share protocol. Another UWB device will show encircled in a blue ring in the Nearby Share menu on Note 20 Ultra.

Samsung has revealed its plans to develop UWB connectivity on Galaxy Note 20 Ultra for Smart Things Find, which will use AR interface and help locate smart objects indoors, and also as a Digital key that will help you unlock doors, cars etc. 

Phones with Ultra-wideband (UWB) connectivity

Only two phones have UWB support as of today, but Xiaomi and other android OEMs are expected to come aboard soon.

  • Samsung Galaxy Note20 Ultra
  • iPhone 11-series and Apple Watch Series 6
  • Samsung Galaxy Z Fold 2


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