Not all streaming services are created equal. With the release of Apple Music, listeners quickly realized there were no quality control options. The difference, until now, was automatic: you heard higher quality sound when streaming music over a Wi-Fi connection than when streaming across cellular data. With iOS 9, Apple is letting you decide for yourself whether better music quality is worth increasing your cellular data usage or not. 

Do you own a Bluetooth speaker or a pair of headphones that you don't know how to disconnect from your iPhone? While you can disconnect your AirPods by simply putting them in the case, we'll also show you how to temporarily disconnect your Bluetooth devices in the Settings app. 

One of the smaller changes with iOS 9 is the appearance of the keyboard when using the Shift key. Before, the keys were uppercase in appearance and the highlighted shift key was the only way to know you were typing in uppercase. With the update, the keys are lowercase except when Shift is active: the entire keyboard changes to uppercase. This can make it easier to know which case you're typing in; however, if you prefer the previous set-up, there's a simple Settings change to turn the lowercase keys off.

Notes receives my award for most improved app of the iOS 9 update. One of the big upgrades is the Sketch feature. Now, Notes combines text, sketch, picture, and sharing to give you many note-taking options. With three different "marker" tips, a ruler, eraser, and color easel, it's a pretty basic sketch application, but it's effective and easily combined with text or images.