Where can I get 16.4 update
Where can I get 16.4 update
iPhone 13 Pro Max
You can not update to iOS 16.4. You can only update to the most recent compatible version of iOS 16.5. To accomplish that, please see: Update your iPhone, iPad, or iPod touch - Apple Support
And: If your iPhone, iPad, or iPod touch won't update - Apple Support
If the above Apple articles do not help, please post back with relevant information.