Update your iPhone, iPad, or Mac to the latest supported software version
Use a supported device
Set your device language to a supported language
Set Siri language to a supported language
Connect to Wi-Fi
Plug your device into power
Go to Settings
Tap Apple Intelligence & Siri
Turn on Apple Intelligence
Wait for the Apple Intelligence download and setup to complete
Restart your device if prompted
Sign in with the same Apple ID on all devices if needed
Keep enough storage available on your device