iPhone5/5C/5S have the same pid 12a8.
iPhone 6 has the same ID too. I'd expect the 6+ to also use it, but I don't have one for testing.
Name: iPhone 5/5C/5S/6/SE
Note: The iPhone SE model shares this ID as well. (I have additionally seen some information online that leads me to believe that almost all iPhone models from the iPhone 5 forward use 12A8; but I haven't been able to confirm this for sure.)
Name: iPhone 5/5C/5S/6/SE/XR
iPhone XR also shares this ID.
Name: iPhone 5/5C/5S/6/SE/7/8/X
Confirmed to also be used by iPhone 7.
Additionally (but not confirmed by me), McAfee has a support page claiming that this ID is also used by iPhone 8, X
Name: iPhone 5/5C/5S/6/SE/7/8/X/XR
I can confirm iPhone XR is also using this id