Not sure which iPhone you've got? Here's how to identify an Apple handset using the model number or information available in the Settings app, or based on the physical design.
What iPhone model do I have? How to figure it out
Identify your iPhone model - Apple Support
iPhone Voicemail not working? 17 Ways to fix it! - iGeeksBlog
How to Tell Which Model an iPhone Is
How to tell which iPhone model you have and find your exact model
How to figure out what iPhone model you have
How to check which iPhone model you have - Android Authority
What iPhone do I have? How to tell your iPhone's model
How To Find Out Which iPhone Model You Have
iPhone Voicemail not working? 17 Ways to fix it! - iGeeksBlog