IPhone 4S

The iPhone 4S was introduced by Tim Cook at Apple's 'Let's talk iPhone' event on 2011. It is very similar to the iPhone 4 (iPhone3,3). Compared to the iPhone 4 (iPhone3,3), the iPhone 4S contains an updated GOBI GSM/CDMA chip, a SIM slot, and a similar (but redesigned) antenna. It uses the board configuration N94AP and the name used in firmware is iPhone4,1. On 2013, Apple started to sell only an 8GB, listed as 4s.

Application Processor
The iPhone 4S makes use of the Apple A5 CPU (clocked at 800 MHz) which can also be found in the iPad 2.

Baseband Device
Qualcomm MDM6610

Latest compatible iOS Version
iOS 9.3.6 (13G37) is the latest version supported on iPhone 4S. iOS 10 and later is not supported.

Location
The iPhone 4S has hardware support for both GPS and GLONASS signals for location determination included with the Qualcomm MDM6610. Apple's online advertising material for the 4S mentions GLONASS support, but as of 2011, no further details about this support have been publicly revealed.

Specifications

 * Display: 3.5" 960x640 LED-backlit IPS display at 326 ppi (Retina Display)
 * Size: 4.5 inches (115.2 mm) (height), 2.31 inches (58.6 mm) (width), 0.37 inches (9.3 mm) (depth)
 * Color: Black or White
 * Battery: Talk time: Up to 8 hours on 3G, Standby time: Up to 200 hours, Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi, Video playback: Up to 10 hours, Audio playback: Up to 40 hours
 * Weight: 140 g (4.9 oz)
 * RAM: 512 MB
 * Voice Assistant: Siri
 * Rear camera: 8MP with Autofocus and manual focus (Tap to focus), supporting HD 1080p video recording at 30 FPS
 * Front camera: VGA photos and 720p videos at 30 FPS, FaceTime Video Calls supported
 * SIM Card: Micro-SIM
 * Connector: 30-pin