Testflight Error when downloading app

Question

i am getting the following error when trying to download app on a iOS 7 device. What could be wrong.

"This build does not list this device as a permitted device."

Answer 1

You need to add the devices, UDID into your iOS Provisioning Profile on the apple developer site, then you need to also add that device in TestFlight and resend the build after it has been built with the updated Provisioning Profile.

Answer 2

It sounds like you attached a new device to TestFlight after the app was built for the older set of devices. The app does not have your new device's profile in it.

To fix, you would build the app again so the new device info is in the app.