Retina display 3.5-inch (diagonal) widescreen Multi-Touch display 960-by-640-pixel resolution at 326 ppi
8-megapixel rear camera; 0.3-megapizel VGA front camera
Apple A5 chip 800 MHz dual-core, 512MB DDR2 RAM
Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.
The iPhone 4S is the follow-up to the very popular iPhone 4 and features a faster Apple A5 dual-core processor and improved 8 megapixel camera. The iPhone 4S also features Siri - a voice assistant heeding natural-language questions and commands, and taking dictation. Other features of this smartphone include a gorgeous 3.5-inch high-resolution display, full web browser, Bluetooth compatibility, music player, WiFi, and 8GB of of internal memory. The iPhone 4S also comes equipped with quadband GSM, CDMA, and WCDMA modes for international use.