Instructions for downloading and installing iOS 11 beta

Because this is only a beta test version, there are still many bugs that have not been fixed.

Last night at WWDC 2017, Apple officially launched iOS 11 with many new improvements. However, currently users cannot update to iOS 11 version, Apple has only released a test version for programmers.
However, if you want to tinker and experience the iOS 11 operating system early, there is a small trick for you to download and install this iOS 11 beta version.

Using the Safari browser on iPad or iPhone, you can download the iOS developer profile here. After installing the Profile, your device will ask to reboot.
Then you do the following steps. Settings > General > System update, here you can see the iOS 11 beta version is available and just select download to install as an Apple update.
Because this is only a beta test version, there are still many bugs that have not been fixed. The iOS 11 version is also not compatible with iPhone 5, iPhone 5c and iPad 4 and below. You should back up your data to iCloud in case you have to reset the device when an error occurs.