With the new iPhone 6 release comes a new iOS (i.e. Apple's mobile operating system) which is available as of last night. And you're going to get it because, dear reader, there are some fancy new apps for your phone that you're going to want to know about.However, there is one rather large caveat, in that you need at least 5.8GB of space on your phone to download it. While all this storage won't actually be used, it does mean you'll need to do a rather significant clear out (or back up) before you can install iOS 8. So before we even tell you what kind of new sorcery you need to be installing on your mobile device, here's a quick guide on how to upgrade (fairly) painlessly.Is your device compatible? If you have an iPhone 4s or newer model you can upgrade. As for iPads you need a 2 model or newerBackup your data. Do this using iCloud or on iTunesNow you've backed up, delete images and apps you don't need to make room for the new iOS. You will be able to reinstall apps from the iCloud or iTunes once you've installed it. However, note that the data stored on the apps will not be retrievableInstall the new iOS 8 by plugging in your device. Simply go to Settings &gt; General &gt; Software Update to upgradeYou can see a longer guide on how to do this hereNow onto the best things about iOS 8:

What you need to know about iOS 8, plus the must-have apps

Everything you need to know about iOS 8, from must-have apps to how to free space to download it