Hello Murph1223,
It sounds like photos saved to contacts after updating your iOS version aren't appearing fullscreen with incoming calls. I'm happy to help you get this resolved.
Are you adding photos to your contacts directly in the Contacts app, or are you doing it another way? If you haven't done so already, try adding a photo to a contact using the Contacts app as described here: Edit contacts on iPhone. The photo you choose must already be in the Photos app or be taken at the time you are adding it to the contact. Keep in mind that the size of the image when you receive a call will depend on on the size and resolution of the image in the Contacts app. Photos that are relatively large and high resolution should show full screen during the call. Photos that are either taken with zoom in the Camera, zoomed when selecting the portion of the image to show for the contact or from a Contact server such as iCloud may appear in a circle rather than being fullscreen.
Thanks for using Apple Support Communities.
Take care.