Can you still ’undo’ on the iPhone in iOS 11? I found this question and answer iOS undo text field clear (x) via a Google search. Thing is, when I shake my iPhone nothing happens. 

Can you still undo on an iPhone using iOS 11? How do I use it? 

I didn’t see anything about Undo in settings!
Yes!

On your iPhone do as follows:


Open Settings
Tap on General > Accessibility
Swipe up until you see the Shake to Undo option
Tap on this and enable it
Exit Settings