iPhone XS doesn't have UDID

Question

I want to add an iPhone XS UDID in the Apple developer portal but I am unable to find the UDID in iTunes and without adding the UDID I am unable to run my app on the iPhone

Answer 1

Considering you are using macOS catalina, and there is no iTunes any more, you may do the following:

1. Go to Finder, select the device from the side bar
2. Select the General Tab so you can see the device name, model number, and other details, as in the image below:
3. Finally, click on the model number below the device name, and it will change to show you the serial number and UDID, as in the image below.