iOS 9, is Apple's next-generation mobile operating system. It was announced at WWDC 2015 June 8, 2015. It includes a more intelligent Spotlight, more proactive Siri, a new News app, an updated Notes app, transit directions in Maps, a renamed Wallet app with store and loyalty cards, tether-less CarPlay, and slide-over and split-screen modes for iPad. It is rumored to be publicly available at September 17th.
To upgrade to the latest iOS 9, there are a couple of tips and tricks that may help you update to iOS 9 smoothly and safely.
1. Be familiar with features of iOS 9
Every time you choose to update to the lates iOS version, you need to be sure that you have learned as much as you can about the most current version to make sure this update includes most of what you want. For example, the proactive assistant, the multitasking, the Android migration and the power saving mode etc.
2. Make room for the update
A trouble most people will run into is insufficient space for the installation of the most recent iOS version. So it is strongly suggested to do a clean up for your iDevice and delete bulky files or transfer them to your computer to free up some valuable storage space that could come in handy after you get the iOS 9 update on board. For example, you can simply get rid of the apps you don’t use often.
3. Backup your device
Data loss happens from time to time during the updating process, and worse still, data wiped out of your iDevice by the iOS 9 updating cannot be recovered unless you have created iTunes or iCloud backup file. So the most important thing to do before the updating is to make sure you have synced your iPhone or iPad or iPod Touch through iTunes to your computer. Or you can use iFonebox, which is specialized iOS data recovery tool to export all the data to your computer for alternate backup.
4. Charge your device
You have to make sure your battery life is sufficient for completing the iOS 9 updating. A minimum of 50% of battery is recommended, if the device isn’t plugged into a power source.