See more details on: What new features does iOS 11 have?
Besides, iOS 11 will run on all devices that have an A7 chip or better, including the iPhone 5s and later, the iPad mini 2 and later, the iPad Air and later, all iPad Pro models, and the sixth-generation iPod touch.
However, Apple may make iOS versions available for beta testing a few months before the final release. So if you want to experience the new features of iOS 11, you can just get its beta version to have a try. But before you download the iOS 11 beta version, there are a lot of things you have to do, follow the below matters need attention.
Try: iOS 11 Beta Download
Part 1. Have an Apple Developer Account
Part 2. Backup Your iPhone/iPad Data
Part 3. Keep a stable firmware version of iOS 10.3
Part 4. Make sure that there is enough space on your device
Part 5. Unpair other devices
Part 6. Update iTunes to the latest version
Part 7. Make sure that your device is fully charged
How to Download and Install iOS 11 Beta on iPhone and iPad without a developer account.
backup iPhone before the upgrade.
iOS Data Recovery Toolkit - iOS Data Backup & Restore is a good tool for you to selectively backup iPhone data without iTunes.
Selectively backup your iPhone in 3 minutes!
One-click to backup and export the whole iOS device to your computer.
Selectively export readable data on your computer.
Support both jailbroken and non-jailbroken devices.
Compatible with all models of iPhone, iPad and iPod touch.
Step 1. Run the program and choose "iOS Data Backup & Restore".
Step 2. Connect your iPhone to your computer and it will soon be detected. Then you can choose the specific items which you want to backup. In the case of doing a backup before an iOS update, you should "Select all" to back up everything. And then simply click "Backup" to begin the process.
Waiting for the backing up process:
Video about how to backup iPhone before the upgrade:
In addition, you can also use the normal way to backup your iPhone data with iTunes or iCloud. Just refer to the detailed tutorial on How to Backup iPhone/iPad Data easily.
Go to Settings > Usage to see how much free storage it has. And if it doesn’t have enough space, then clear data from its storage (delete photos, music, videos, or apps) before you download the beta version of iOS 11. Or see more about How to free up space on iPhone?
Just go to the “Watch” app on your phone and go to the “My Watch” tab, then tap on the “i” (information) button and choose to “Unpair Apple Watch”. And make sure that you do this before the iOS 11 Beta release date.
That’s all, to avoid some complications, just remember the above matters before you decide to update to the iOS 11 beta. Besides, see also iOS 11 issues on Top iOS 11 Update Problems and Solutions.