Untrusted Enterprise Developer: You have just signed up with Uber and is excited to start driving until you see this warning message on your iPhone after you installed the app.
Troubleshooting Uber Partner App in iPhone
Go to Settings -> General -> Device Management -> Click on Uber Technologies, Inc -> Trust Uber Technologies, Inc button.
You will see Uber Partner app is verified after you click on the trust Uber Technologies, Inc. The app can be used now. Go to setup your account next