The iPhone 3GS is a cell phone that is wireless. This phone also has a camera with 3MP AND 480p video and memory of 256 MB RAM. It also has updates of OS 3.0 to 3.2. The size was very small as well.
The iPhone 4 is a higher memory with 512 MB RAM. It also has a camera with 5MP, and 720p video which give it more storage. The updates are OS 4.0 too 4.3.
iPhone 4s has the camera storage of 8MP and 1080P video. The memory is 512 MB RAM. This iPhone has the updates of iOS 5.0 TO 5.1, there was apps like Siri, iMessage and iCloud now.
The iPhone 5 has the same amount of camera storage and now the memory goes into 1 GB Ram. The iOS updates just keep moving up, this one is 6.0 to 6.1. The apps that came along are Apple Maps, Passbook, Photo Sharing and many more.
iPhone 5C and 5S
On the iPhone 5C and 5S has the same memory and camera storage as iPhone 5. The updates went up one, so this is 7.0 to 7.1. They added the Fingerprint Touch ID to open the cell, air drop, control center, multitasking upgrade and facetime audio.
iPhone 6 and 6 Plus
The iPhone 6 / 6 Plus stays the same for the camera and memory storage. The updates, they went up to 8.0 to 8.4. Along with the apps, more came about like the apple pay, health app, family sharing, iCloud drive and continuity.
iPhone 6S and 6S Plus
On the iPhone 6S and 6S Plus the company went up in camera storage to 12MP 2160p video and the memory went up to 2GB RAM. Like always the iOS update went up to 9.0 to 9.3. Some new apps is the notes, nightshift and 3D touch.
iPhone SE / 7 / 7 Plus
iPhone SE / 7 / 7 Plus has the same memory and camera storage, but the iOS went up to 10.0 to 10.3. New apps came about like the weather app, home app, and improved lock screen.
iPhone X / 8 / 8 Plus
The iPhone X / 8 / 8 Plus got the apps Siri translation, file app and face ID to open your phone. Updates went up to 11.0 to 11.4 iOS. Storage stayed the same.
iPhone XS / Max / XR
The memory on this iPhone went up to 4GB RAM. The camera stayed the same and the iOS went to 12.0 to 12.1. New apps that came was screen time memoji and password management.
iPhone 11/ Pro / Max
iPhone 11 / Pro / Max went to triple 12 MP on the camera and stayed the same for the memory. iOS updates went to 13.0 to 13.3. New apps that came about are the dark mode smart photos app and revamped maps app.
The iPhone 13 and 13 mini is going to be coming. It was have a better camera quality. A15 chip and will be 5G. This phone will be for people who need a phone with the main sources. It also has up to 2.5 hours longer then the iPhone 12. https://www.macrumors.com/roundup/iphone-13/
The iPhone 14 will look like the iPhone 12 and 4 crossed. It will return to the touch ID. This iPhone will have trio camera lenses and will be made out of titanium to make it stronger. https://www.tomsguide.com/news/iphone-14