Some users may meet with the problem that 3uTools or other apps can’t be opened on iOS9, and it has only one option “Cancel”. So how to solve this kind of problems? You just need to open the “Settings” of your iDevice →click the button “General”→find and click the option “Description files”( Device Management)→click the button “Trust”.

If you can’t open the apps downloaded from 3uTools, please try the following steps.

Step 1: When you open 3uTools, the system will give a reminder. Then you need to remember the English part of this reminder.

Step 2: Open the “Settings” of your iDevice→click the button “General”→choose the option “Description Files”.

Step 3: You need to find and click the previous description file.

Step 4: Please click the blue words→click the button “Trust”, and then you can return to the desktop and open 3uTools again.