Smart Locks Are Getting More Advanced: UWB, Phone Keys, and Matter Explained

Smart locks used to be simple: a keypad or an app to unlock your door. The new generation is smarter and more secure, thanks to three technologies you'll see on the box — UWB, phone keys, and Matter. Here's what they mean and what can still go wrong.

The three terms, explained

• UWB (ultra-wideband) lets the lock know exactly how far away you are — to within centimeters. That enables true hands-free unlocking: the door opens as you walk up, but not when your phone is sitting inside the house.
• Phone keys turn your phone (or watch) into your key, with digital keys you can share. No physical key to lose or copy.
• Matter is the smart-home standard that lets the lock work across Apple, Google, and Amazon — so you're not locked into one app.

Why this is better

• Hands-free entry that actually works when your hands are full.
• More secure than old keyless systems. UWB's precise distance check defeats "relay attacks," where thieves used to trick a car or lock by relaying the signal from your key indoors. The lock now opens only when you're really there.
• Easy guest access — send a digital key to a visitor, with time limits, and revoke it anytime.
• No lock-in with Matter support.

What can go wrong

Be realistic — a smart lock is still electronics on your front door:

• Dead battery. The lock runs on batteries; let them die and you're locked out. Keep a backup (a physical key option or recharge plan) and watch low-battery alerts.
• Phone dies or is lost. Have a fallback entry method.
• Setup and connectivity. It needs solid Wi-Fi/Thread; flaky connections mean flaky unlocking.
• Security basics still apply. Protect the account and app with a strong password and two-factor login — your lock is only as safe as the account behind it.

Buying tips

• Look for Matter support (works with your ecosystem) and UWB if you want true hands-free.
• Choose a reputable brand — this is your front door, not the place to save a few dollars on a no-name device.
• Make sure there's a backup entry method (physical key or keypad).

Bottom line

Modern smart locks are genuinely better: hands-free entry via UWB, shareable phone keys, and Matter compatibility, with security that beats older keyless systems. Just respect the failure modes — keep the batteries charged, have a backup way in, and lock down the account. Buy a trusted brand and a smart lock is convenient and safe.