Will iPhone 7 receive iOS 17?
iPhone 7 cannot even update to iOS 16 or iOS 17. You need to buy a new phone to run the apps that you want to use. 15.7. 9 is the end of the line for your phone.
How to get iOS 17 on iPhone 8?
Possible iPhone models to receive iOS 18 update include iPhone 15 series, iPhone 14 series, iPhone 13 series, iPhone 12 series, iPhone 11 series, iPhone XS, XR, and SE models.
What phones will get iOS 18?
Go to Settings > General > Software Update. Either way, once you see Install Now or Download and Install, tap that and follow the instructions from there. (You'll also get a choice to Download Tonight in case you need your phone and would prefer it to update while you're asleep.)