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By (user no longer on site)
over a year ago
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There are two ways to update your iPhone, iPad or iPod to iOS 8: over the air (via Wi-Fi) or through iTunes.
Before you upgrade, there are a couple of housekeeping jobs to do. First, update your apps as certain out-of-date apps won’t work in iOS 8.
Second, check if you have enough free storage space as the update requires at least 5.8GB of storage for temporarily storing the download during the update. You can check how much space is available by tapping Settings General Usage. The list of apps will tell you which ones are using up your phone or tablet’s storage. Typically, it will be the Photos app, which is full of your images and videos. You should copy these to your PC and then delete those you don’t need on your device to free up space. Videos use up the most space, but beware that these aren’t backed up to your iCloud Photo Stream. Only photos are included. If you want to copy your videos, connect your device to your computer and use Windows Explorer to Finally, make sure your iPhone, iPad or iPod touch is backed up to iCloud or your computer via iTunes before performing the update. It's unlikely anything will go wrong, but if it does, you could lose any data that's changed since your last backup such as new contacts, documents, photos, videos and more.You should also connect your wall charger as the update will take some time. Over the air iOS 8 update When the update has been released, you should see a pop-up notification on your screen at some point telling you that a software update is available.If you want to force your iPhone or iPad to check if the update is available, tap Settings, General, Software Update. Your smartphone or tablet will check if iOS 8 is available and you can then follow the instructions on screen. When prompted, tap Download to download the iOS 8 update (it's around 1GB, but varies across devices). Once this is finished, tap Install to upgrade iOS iTunes
If for some reason you don’t want to update to iOS 8 over the air, you'll need to connect your device to a computer running iTunes. You should update iTunes to the latest version (currently 11.4) before connecting your iPhone, iPad or iPod touch. To do this, launch iTunes and from the Help menu, click Check for Updates. Once you have the latest iTunes, connect your device and it should display a message saying a software update is available. If you don't see this, simply click on your iPhone, iPad or iPod touch in the Devices list and then click the Check for Update button.
You'll be prompted to download and install the update - make sure you don't disconnect your device before the upgrade process is finished.
Whether updating over the air or via iTunes, your iOS device will restart after installing iOS 8.
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