Adding devices to team provisioning profile

Question

I need to add a device to my team provisioning profile, however I do not physically have the device so I can\'t hook it up to my computer so Xcode can\'t add the UDID to my

Answer 1

As of Sept 2018, Apple seems to (or a bug) block the normal way to get your XS and XS Max's UDID. Even XCode could not properly register new phones for you.

After a couple hours of digging, I figure it out:

• Connect your iPhone to your Mac.
• Navigate to  -> About This Mac.
• Click on System Report and select USB.
• Click on iPhone, and copy the value next to the Serial Number label.
• Copy and paste the value. You then need to add a – after the 8th digit.
• This is the UDID for the iPhone XS and iPhone XS Max.

Source