The appium docs have a pretty good explanation on this:
http://appium.io/slate/en/master/ > “Appium on real iOS devices”
The UDID can be found if you plug in your device and launch Xcode.
Select Devices
Find your device identifier. That’s your UDID
the bundle id starts with com.X.Y.Z. It’s found in the Xcode project settings. Ask your developers what the bundle id is for your project - they should be able to tell you.
Also, for real devices - you need to enable ui automation.
Good luck!