You’ll find the model number in the slot, but it might be a bit small and hard to read. It could be useful if, for example, your phone won’t turn on though. If all else fails, it’s possible to narrow ...

Find your iPhone model: Look for the 'A' model number on the back or in the Settings app to determine which iPhone version you have. 'A' model number location: Pre-2017 iPhones have the 'A' number ...