• iOS 11 improves the usability of the phone
  • 3D Touch and Control Center are both improved
  • Some bugs are present in third-party apps

Most iPhone users you’ll speak to will agree that iOS 11 is a welcome and well thought-out upgrade. The visual changes are relatively minor, but they all really enhance the usability of the phone.

As shown by our earlier tests, you'll want one of the new iPhones for optimal performance when using the iOS 11 interface – unsurprisingly – but whichever handset you're using, the little tweaks are the most useful.

The new Control Center is really easy to use

3D Touch is the biggest winner with the new changes, thanks to there being, well, just more that you can do with it.

Many more third-party apps have begun to offer extensions, with options activated by pressing harder either on the app icon itself or within the app. It’s not an intuitive motion to push in harder initially, so if you want to get the the real benefits you have to constantly remind yourself of this feature's existence. 

But in the all-new Control Center – the pane you drag up from the bottom of the screen – a longer press on any of the widgets offers genuinely useful extras, from the torch having more levels of brightness to the music app becoming fully functional.

There are bugs in the system though, and these hang around clearly unoptimized third-party apps. We experienced a number of unresponsive titles, or found keyboards being either too low, or covering the text box you’re trying to type into.

Annotations to screengrabs really need a stylus

This isn’t alien for a new release of iOS – often when a new version of Apple’s mobile software is released we’ll see issues appearing with some apps – but with iOS 11 having spent so long in beta made this was a little unexpected.

The addition of Files adds something that iPhones have been lacking for years: a peek behind the curtain to access the files hidden inside apps.

Except it really isn’t that. You can’t open the app and see your photos and videos – you have to save them to the Files app before you can view information on them or copy them to the cloud. 

Files is OK, but not as comprehensive as we'd like

We get that Apple is trying to control the experience so people don’t get confused rooting through their file system, and sharing from within apps is more straightforward, but having to wait 30 seconds to save something to Files irks.

It’s something the top Android phones let you do easily – excellent when you want to download something from the internet and access it easily for email.

The new screen grab feature is nice: capture one and it’ll show as a small preview in the bottom of the screen, from where a tap will open it for annotation. 

The new lock screen is improved with easier-to-view information

However, a finger is too fat to properly scribble or annotate on them; a smaller Pencil would be perfect here, but let’s face it – that’s too much like Samsung’s S Pen.

The iOS 11 upgrade – although universal to all recent iPhones – shines brightest on the iPhone 8 Plus, and offers a genuine reason to go for the bigger option, for the speed of operation on the heavier tasks if nothing else.