I've built a Xamarin app and created a .ipa file using my distribution certificate and ad hoc provisioning profile. I'm able to install it on my iPad that has iOS 12 but not on my iPhone 8 that now has 14.4. I can develop on the phone. I'm pretty sure my UUID is in the pp. I got it to work before on Catalina but it was always temperamental (would reboot the iPhone a lot). My mac has Big Sur ver 11.3 and I'm dragging the .ipa file and dropping it on the iPhone device in Music - this works for my iPad. It fails silently for the iPhone. For the iPad, when I drag the file over the device it gets a nice green + like it can detect it will accept the file, but on the iPhone it just snaps back. Is there an error message logged anywhere that can give a clue as to why it's not working? I've looked at my system logs and logs from the phone using the Console app but can't make any sense of what I'm seeing. I'm really at a lost of how to trouble shoot it. There must be a way to get a clue as to why it's not working? I'm not a iOS or Mac pro obviously. Thanks for your help, Brett