My iPhone app does not work after upgrading to iOS 9.1 - not working and frozen

After upgrading to iOS 9.1, all apps on my iPhone 6 are not working and frozen. Are there any solutions to get rid of this trouble? I do appreciate your helps.

Thanks,

You can attempt to hold both the power and home buttons for 20 seconds till Apple Logo appears. This should fix your problem. Otherwise, you have to wait for update from Apple.

It works.
Many Thanks