Compare Apple iPhone 4S 16GB black deals
The iPhone 4S features a dual core A5 processor, an 8 megapixel camera with 1080p video record, Siri advanced speech recognition and the new iOS 5 operating system. It's available in black or white with 16GB, 32GB or 64GB memory. The dual-core A5 chip promises up to 2x faster performance and 7x faster graphics. The 8 megapixel camera can take exceptionally good photos. It can also record HD video at full 1080p resolution, with video stabilisation, and AirPlay Mirroring will allow wireless streaming to an Apple TV. The screen remains the same as the iPhone 4 with Apple's 3.5 inch Retina display (640x960 pixels).

The new Siri voice controlled assistant lets you use your voice to send messages, schedule meetings, place phone calls and much more. Siri understands what you say, knows what you mean, and even talks back. For example you could say something like 'Tell my wife Im running late 'Remind me to call the vet', or 'Any good sandwich shops around here?' And Siri will answer.

The new iOS 5 operating system has over 200 new features. The New Notification Centre shows missed calls, messages, calendar invitations, friend requests and more. The camera app can now be accessed quickly from the lock screen, it has grid lines, pinch-to-zoom and touch focus. Photos can be edited from the photo viewer, with crop, rotate, enhance and red eye removal. Other highlights to iOS 5 include iCloud, Twitter integration, iMessage and Reminders.

Finally, iPhone 4S has an improved battery with 8 hours 3G talk time, 14 hours 2G, 9 hours Wi-Fi web browsing, 6 hours 3G browsing, 10 hours video or 40 hours of music playback.

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