In some cases of “Unfortunately system UI has stopped” bug, dealing with the system cache helps so if the problem is still not resolved at this point, be sure to try clearing the cache partition.

If the System UI issue won’t appear on safe mode, that means that the problem is due to a bad app. Uninstall the app you recently installed and see if that will fix it.

If your Android device shows an error reading "System UI isn't responding," we've got several tips you can try to get things working smoothly again.

Your Android phone has hidden functions in its System UI Tuner and Developer options settings. Here's how to access and make the most of them.

To enable System UI Tuner in Android 6.0 Marshmallow preview 3, pull down your notification shade and long-press on the Settings gear icon for up to 5 seconds.

Remember the System UI Tuner that showed up in the original Android M Preview? You know, the hidden developer option that would allow you to tweak the settings toggles in the notification shade ...

So Google has kept them hidden. However within the System UI Tuner, there are all sorts of options, with the most popular one being the ability to have a night mode on your smartphone.

Dark mode has become an increasingly popular theme in a variety of third-party apps, and users have since been clamoring for a way to easily toggle on a dark mode across their operating system ...