1. If a notice "Untrusted Enterprise Developer" popup when running the installed application, please remember the name of Description File in the notice first.
2. Then, click 【Settings】→【General】, slide to the bottom → 【Device Management】
3. Find the File that popup in the notice, click it and then click 【Trust】
Application can be ran as normal when finished the operations above. 【Detailed tutorial with pictures as follow】