Differences Between iPhone XR Models: EveryiPhone.com
everymac.com › systems › appleSep 23, 2021 · It is not possible to identify specific iPhone XR models this way, either. One relatively easy way to uniquely identify the iPhone XR models is by the Model Number listed on the cardboard shipping box and within the iOS "Settings" app. For the purpose of this Q&A, it is sufficient to note that the following model numbers refer to these devices:
Identify your iPhone model - Apple Support
https://support.apple.com/en-us/HT20129623.09.2021 · Model number on the back cover: A1456, A1507, A1516, A1529, A1532. Details: The front is flat and made of glass. The back is hard-coated polycarbonate (plastic). There's a SIM tray on the right side that holds a "fourth form factor" (4FF) nano-SIM card. The IMEI is etched on the back cover. See the tech specs for iPhone 5c.