Some of these directions apply to all iPhones, but some are only relevant to specific iOS versions. These differences are pointed out below. The most common way to keep apps updated on your iPhone is ...

In the Settings app, go to Accessibility > Touch > Back Tap and choose one of two options: double tap or triple tap. You ...

So, you've been binge-watching your favorite TV series on your iPhone all afternoon when out of nowhere, your screen starts dimming on you. No biggie — you probably just have auto-brightness on.