The iPhone 4S is a gradual step over the iPhone 4 improving the internals, but keeping the look and feel. At the same time, though, it brings a reworked iOS 5 and introduces Siri, a personal voice assistant allowing you to vocally communicate with the iPhone. It comes with a 3.5" screen with a resolution of 640 x 960 pixels, but on the inside there's a twice more powerful dual-core A5 processor. It also improves connectivity a notch, bringing 14.4Mbps HSPA download speeds. The back is where an 8-megapixel camera resides and it's capable of recording 1080p videos.
Pros
Dual core processor
Extremely high pixel density screen, over 300ppi (330 ppi)
High-resolution display (640 x 960 pixels)
High-resolution camera (8 megapixels)
Dual-mode CDMA/GSM phone
Small dimensions (4.54 x 2.31 x 0.37 inches)
Cons
Lacks microSD slot for storage expansion
Proprietary USB connector - have to use its cable instead of a standard microUSB
Specification
| GENERAL | 2G Network | GSM 850 / 900 / 1800 / 1900 |
| CDMA 800 / 1900 | ||
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| CDMA2000 1xEV-DO | ||
| Announced | 2011, October | |
| Status | Available. Released 2011, October | |
| BODY | Dimensions | 115.2 x 58.6 x 9.3 mm |
| Weight | 140 g | |
| DISPLAY | Type | LED-backlit IPS TFT, capacitive touchscreen, 16M colors |
| Size | 640 x 960 pixels, 3.5 inches (~330 ppi pixel density) | |
| Multitouch | Yes | |
| Protection | Corning Gorilla Glass, oleophobic coating | |
| SOUND | Alert types | Vibration, propriety ringtones |
| Loudspeaker | Yes | |
| 3.5mm jack | Yes | |
| MEMORY | Card slot | No |
| Internal | 16/32/64 GB storage, 512 MB RAM | |
| DATA | GPRS | Yes |
| EDGE | Yes | |
| Speed | HSDPA, 14.4 Mbps; HSUPA, 5.8 Mbps | |
| WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | |
| Bluetooth | Yes, v4.0 with A2DP | |
| USB | Yes, v2.0 | |
| CAMERA | Primary | 8 MP, 3264x2448 pixels, autofocus, LED flash, check quality |
| Features | Touch focus, geo-tagging, face detection, HDR | |
| Video | Yes, 1080p@30fps, LED video light, video stabilization, geo-tagging, check quality | |
| Secondary | Yes, VGA, 480p@30fps, videocalling over Wi-Fi only | |
| FEATURES | OS | iOS 5, upgradable to iOS 5.1 |
| Chipset | Apple A5 | |
| CPU | Dual-core 1 GHz Cortex-A9 | |
| GPU | PowerVR SGX543MP2 | |
| Sensors | Accelerometer, gyro, proximity, compass | |
| Messaging | iMessage, SMS (threaded view), MMS, Email, Push Email | |
| Browser | HTML (Safari) | |
| Radio | No | |
| GPS | Yes, with A-GPS support and GLONASS | |
| Java | No | |
| Colors | Black, White | |
| - MicroSIM card support only | ||
| - Scratch-resistant glass back panel | ||
| - Active noise cancellation with dedicated mic | ||
| - Siri natural language commands and dictation | ||
| - iCloud cloud service | ||
| - Twitter integration | ||
| - TV-out | ||
| - Google Maps | ||
| - Audio/video player and editor | ||
| - Image editor | ||
| - Voice command/dial | ||
| BATTERY | Standard battery, Li-Po 1432 mAh | |
| Stand-by | Up to 200 h (2G) / Up to 200 h (3G) | |
| Talk time | Up to 14 h (2G) / Up to 8 h (3G) | |
| Music play | Up to 40 h | |
| MISC | SAR US | 1.18 W/kg (head) 0.98 W/kg (body) |
| SAR EU | 0.99 W/kg (head) 0.99 W/kg (body) | |
| Price group | 8 out of 10 | |
| TESTS | Display | Contrast ratio: 1261:1 (nominal) / 2.269:1 (sunlight) |
| Loudspeaker | Voice 65dB / Noise 64dB / Ring 74dB | |
| Audio quality | Noise -91.2dB / Crosstalk -93.0dB | |
| Camera | Photo / Video | |
| Battery life | Endurance rating 45h |
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Thanks for posting such an informative blog. I recently checked out the specifications of the iPhone 4S and found your content to be incredibly useful
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