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

You can compile the UDID from the ECID that is shown by iTunes with the following formula (for XS and XS Max)

0000CHIP-00ECID

The CHIP version in the XS/XS Max case is 8020 (source for it)

So if you want to compute the UDID for an XS/XS Max (and I believe the XR has the same chip), then you'll need to replace the ECID with your own in:

00008020-00ECID

To find the ECID, connect the iPhone to iTunes and click the serial number, the ECID will show up.

Edit: For the XR the formula is: 00008020-000ECID, because the ECID has one less character