how do i get this specific update for this iPhone
How do i get this specific update for this iPhone 7
Question marked as
The iPhone 7 can only be updated to the most recent, compatible version of iOS (15.7.2). To do 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.