Restore iPhone from iTunes backup
I feel like I'm beating a dead horse with this issue but I need a definitive answer since there are conflicting views on what I want to do. Please read carefully before responding:
I have a 128Gb iPhone SE2, I created an iTunes(Windows PC) backup(iOS 16.6) a few weeks ago and tragically I consented to upgrade iOS to 17.1.1 AFTER the backup. There's clearly no downgrade path for my current phone at this point.
I have another virgin 128Gb iPhone SE3 that has iOS 16.6 and I'm wondering if I can plug this 'new' phone into iTunes and use that two week old iOS 16.6 backup to restore this phone to be like my old phone BEFORE the 17.1.1.update?
I'm asking this because there's conflicting information on the restore doing an iOS update during the restore and I DO NOT want that to happen. Even if the restore failed for any reason I would want this phone to remain at iOS 16.6 so I can simply start fresh.
Thanks in advance.
iPhone SE (2nd generation)