With iOS 8 on the iPhone there are a heap of features that are well know. Here are some that you might not know exist but could find to be very useful.

Didn't mean to delete that picture?

Don't panic. Tap Albums and open the Recently Deleted Album. Tap the photo, then tap Recover.

Take a closer look

You can double-tap with three fingers to make a magnifying glass appear. Turn it on in Settings > General > Accessibility > Zoom.

Respond to a call with a text

Can't take a call? Tap Message to send a pre-written text message response. Customise the messages in Settings > Phone > Respond with Text.

Source: Apple