https://wccftech.com/iphone-11-users-reporting-ultra-wideband-update-failed-error/

Some iPhone 11 and iPhone 11 Pro users have been reporting an ‘Ultra Wideband Update Failed’ error, after updating to iOS 13.1.3 and iOS 13.2 beta 3. This impacts the iPhone’s capability to send files via AirDrop because it uses the new U1 ultra-wideband chip. This issue does not seem to be widespread, but it is being discussed on various online forums, along with a solution that has worked for some.

Users from Apple forums, Reddit and MacRumors forums have been sharing their experiences with the ultra-wideband failed error message appearing on iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max. The following message pops up after updating to iOS 13.1.3 or iOS 13.2 beta 3, or even iOS 13.1.1, as shared by some users.