U400 and UWB doesn't unlock when I walk up

Developer Hub
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1

I’ve got everything up and running.
U400 and M3 Hub in the Aqara app and in Apple home.
Beta software installed

The UWB is very intermittent and unlocking when I walk up to it it’s kind of the only reason I’m sure most of us purchased this lock in the first place.
Is there anything I can do to fix this?

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2

When you say beta software, are you using a beta version of iOS? It would also be helpful to know what the firmware version is on the u400.

3

Dear Users,

Please contact our technical support team for personalized assistance. In the meantime, you can perform the following self-checks to troubleshoot your UWB performance:

  1. Check the Antenna Connection: Unscrew the rear panel to inspect the UWB antenna.
    :warning: Important: The antenna is extremely fragile. Please handle it with care—any damage to the wire or connector will lead to UWB malfunctions. Ensure the connector is fully seated before reassembling.
    91CA92AF-5E8B-4038-A016-F13CB7C481BE
    91CA92AF-5E8B-4038-A016-F13CB7C481BE632×426 60.9 KB
  2. Refresh Apple Home Settings: Open the Apple Wallet app on your iPhone, locate your Home Key, and toggle the “Unlock on Approach” feature off and then back on.
  3. Software Updates: For the most stable and smoothest performance, we highly recommend updating your devices to iOS 26.2 and watchOS 26.2.

Hope this will help!

4

No the Aqara beta 3.1.07
I have an iPhone Air updated with current iOS 26
This morning I came back from walking the dog and stood right in front of the door for a few seconds before it unlocked
I checked the cables and they look good