Sometimes you need to get the UID off an iPhone and I’m gonna show you how to do that with Apple Music on a Mac:
1) Launch Apple Music
2) Plug in your iPhone into the computer.
3) Phone appears on the left-hand menu of Apple Music
4) Click on phone in Apple Music
5) Tap on the second row of the Phone Description and it will show Serial Number
6) Tap again and it will show UUID
7) Right Click to bring up a menu and select copy UUID
8) Now you have the UUID in your clipboard and can copy into a new program.