What should I do when getting ‘Untrusted Enterprise Developer’ pop-up in iOS?
‘Untrusted Enterprise Developer’ is the pop-up which is displayed when you are trying to install any custom enterprise app on your iOS 9 device.
You will be asked to ‘trust’ the Enterprise developer certificate during the first time installation of the Ubertesters hub.
It is possible to ‘trust’ the certificate in the following way:
Go to Settings > General > Profiles or Profiles & Device Management;
Select the developer certificate in the “ENTERPRISE APP” section;
Press “Trust … Apps on this iPhone”;