You can update to i OS 11 When the i Phone or i Pad has finished installing i OS 11 the device will boot into i OS 11, where you will be presented with a few simple setup options to get started.
Once complete, you’re back to the Home screen and ready to use the latest version of system software!
Perhaps a future version of i OS will offer an ability to completely ignore an i OS software update directly on the device, but in the meantime the only way to accomplish this is when the device is connected to a computer with i Tunes.
When Apple releases a new version of i OS it's normally a simple process to update it on your i Phone or i Pad.
Then you can simply select the item in the downloads list and hit the “Delete” key to remove it.Now that you’re updated, you can see some of the best new features in i OS 11 available on i Phone and i Pad.Some of the changes to the operating system are fairly subtle so it can be helpful to have a few of the best pointed out, but like always it’s worthwhile to explore the software yourself and get a feel for what’s new.The complete i OS 11 compatible devices list is here, but essentially if you have an i Phone 5S or newer, or an i Pad Air or newer, or an i Pod touch 6th generation or newer, your device will be compatible with i OS 11.Keep in mind that 32-bit apps will not work in i OS 11, so if you have a critical app that is 32-bit and not yet updated to be 64-bit then you may want to hold off on installing i OS 11 as the app will no longer work.