| Apple iPhone 3G | Apple iPhone 3GS |
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| Older version | Latest version |
| 8GB flash drive capacity | 16GB or 32GB flash drive capacity |
| 412MHz CPU and 128MB of RAM | 600MHz CPU and 256MB of RAM |
| 2 megapixels camera with photo geotagging; no video recording capability | 3 megapixels camera with autofocus and tap to focus. Video recording at VGA resolution up to 30 fps with audio. Video editing capability. |
| GPS, WiFi, Bluetooth, but no Digital Compass | GPS, WiFi, Bluetooth, and Digital Compass |
| 3.5-inch (diagonal) widescreen Multi-Touch display with 480-by-320-pixel resolution at 163 ppi | 3.5-inch (diagonal) widescreen Multi-Touch display with 480-by-320-pixel resolution at 163 ppi |
| Accelerometer, Proximity sensor, Ambient light sensor | Accelerometer, Proximity sensor, Ambient light sensor |
| 5 hours of talk time on 3G 5 hours of internet use on 3G 6 hours of internet use on WiFi |
5 hours of talk time on 3G 5 hours of internet use on 3G 9 hours of internet use on WiFi |
| Built-in Voice Memos, Spotlight Search, and Multimedia Messaging applications | Built-in Voice Memos, Spotlight Search, Multimedia Messaging, Compass, and Voice Control applications |
| £96.89 with a 18 month contract and £30 monthly tariff from O2 | £184.98 with a 18 month contract and £30 monthly tariff from O2 for the 16 GB model £274.23 with a 18 month contract and £30 monthly tariff from O2 for the 16 GB model |