At a Glance: Apple’s latest iPhone 4S vs. older iPhones

— Capacity: 16 gigabyte model for $199, 32 gigabytes for $299 and 64 gigabytes for $399

— Size: height: 4.5 inches; width: 2.31 inches; depth: 0.37 inch (the same as the iPhone 4)

— Weight: 4.9 ounces

— Display: retina display, 3.5-inch (diagonal) widescreen multi-touch display

— 8-megapixel camera

— Video recording: high-definition (1080p — comparable to the resolution of a 40-inch flat panel TV) up to 30 frames per second with audio

— Battery: talk time is up to 8 hours on 3G, up to 14 hours on 2G. Internet works for up to p to 6 hours on 3G, and up to 9 hours on Wi-Fi, one hour shorter than the iPhone 4. Up to 10 hours of video playback.

— Dual-core A5 processor (which is twice as fast, and renders graphics 7 times faster than the previous model’s A4 processor)

— Video calling: Facetime

— Wireless carriers: ATT, Verizon Wireless and Sprint Nextel

—Release date: October 14, 2011

iPhone 4 tech specs:

— Capacity: 8 gigabyte flash drive (Apple is no longer selling the bigger versions)

— Size: height: 4.5 inches; width: 2.31 inches; depth: 0.37 inch

— Weight: 4.8 ounces

— Display: retina display, 3.5-inch (diagonal) widescreen multi-touch display

— 5-megapixel still camera

— Video recording: high-definition (720p — comparable to an older-model flat panel TV) up to 30 frames per second with audio

— Battery: talk time is up to 7 hours on 3G and up to 14 hours on 2G. Internet works for up to 6 hours on 3G and up to 10 hours on Wi-Fi. Up to 10 hours of video playback.

— Video calling: Facetime

— Less powerful A4 processor, not dual core

— Price: $99 with a two-year contract

— Wireless carriers: ATT, Verizon Wireless

—Release date: June 24, 2010

iPhone 3GS tech specs:

— Capacity: 8 gigabyte flash drive

— Size: height: 4.5 inches; width: 2.4 inches; depth: 0.48 inch

— Weight: 4.8 ounces

— Display: 3.5-inch (diagonal) widescreen multi-touch display.

— 3-megapixel camera

— Video recording: up to 30 frames per second with audio, no HD

— Battery: talk time is up to 5 hours on 3G, up to 12 hours on 2G. Internet use is good for up to 5 hours on 3G and up to 9 hours on Wi-Fi

— Video calling: None

— No dual-core processor

— Price: free with a two-year contract

— Wireless carrier: ATT

—Release date: June 19, 2009

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