Update software
Can iSoftware 16.3.1 is update on iPhone 11?
Question marked as
Yes. When updating, your device will update to the highest version currently available that it will support. Here are two different ways to ensure the highest iOS that your device will support is installed on your device.
For instructions about updating your iPhone, iPad, or iPod touch wirelessly, click here --> Update your iPhone or iPad - Apple Support
Here are instructions about how to update your iPhone, iPad, or iPod touch with the Finder on a Mac computer --> Update your iPhone, iPad, or iPod touch with the Finder - Apple Support