Wednesday, September 16, marks the release of iOS 9, and the new mobile OS has a ton of cool features. Although it ships out with the new iPhone 6s and 6s Plus, those of us who haven’t committed to a new iPhone can also upgrade. Here’s what to do to get iOS 9 running on your device.
  1. Check Compatibility
    Even if your iPhone or iPad is nearing its fourth birthday, you can probably still upgrade. iOS is compatible with devices as old as the iPhone 4s, iPad 2, and 5th generation iPod touch. Newer models are also compatible (of course). For the most part, any device that was compatible with iOS 7 is also compatible with iOS 9 (sorry iPhone 4).
  2. Back Up
    If you're backing up via iCloud, go to Settings > iCloud > Backup. Next, make sure “iCloud Backup” is turned on, and hit “Back Up Now” (you need to be connected to Wi-Fi to do this). To check if the back up worked go to Settings > iCloud > Storage > Manage Storage, then choose your device. If you're backing up your device through your computer, connect your device and open iTunes. Next go to File > Devices > Transfer Purchases, and when that’s done go to File > Devices > Back Up.
  3. Free Up Storage
    Updating your device requires free space. This tends to be a source of panic for those of us who have filled our 16GB iPhones to the brim. To find out which apps are eating all of your precious storage go to Settings > General > Usage > Manage Storage. Now is a good time to delete all those apps you never use, and transfer your media files to your computer for safe keeping.
  4. Update Away
    To update to iOS 9 through your device, go to Settings > General > Software Update > Download and Install. If you don’t have enough storage to update over the air, you can update using iTunes. Make sure you have the latest version of iTunes installed, then plug your device into your computer. When your device pops up in iTunes, look for the Summary box. Hit “Check for update," then download and update.