A new iPhone is here and it's called the iPhone 4S. It may not have been the iPhone 5 the tech world was expecting: the iPhone 4S has an almost identical physical design to the previous iPhone 4. However, it boasts a number of improvements that make it a worthy upgrade provided you're coming from an iPhone 3G or iPhone 3GS. For iPhone 4 owners, however, the iPhone 4S is less appealing — even if it remains a fine smartphone in its own right.

If you're upgrading from an iPhone 4, Apple's new iPhone 4S is best described as an evolutionary rather than revolutionary upgrade. However, for current iPhone 3G and 3GS users, or those switching from another platform, the iPhone 4S is a significant upgrade. A higher quality camera and video recorder, a faster processor, a better graphics chip, more memory options and Siri voice control make this one of the best smartphones on the market.

Excellent performance; Improved 8-megapixel camera; Siri voice assistant;

Identical design to predecessor; Upgrading from an iPhone 4 less appealing;

Apple iPhone 4S 8GB- A Revolutionary Smartphone! Pros: - This Apple smartphone has a beautiful lightweight white body with soft-curved edges.- The brilliant Retina display of this Apple iPhone 4S 8GB has a high resolution of 960 x 640 pixels.

While we have a hard time recommending an upgrade for current iPhone 4 users, the new additions prevent the iPhone from becoming antiquated in a quickly churning smartphone market.

Ultra-capable camera; Siri voice assistant is handy; novel; HSPA+ delivers speed boost; Same gorgeous Retina display; Solid; attractive design

Still nowhere near 4G LTE speeds; No expandable storage; replaceable battery; Fragile glass back necessitates case

Apple iPhone 4 Review There are smartphones and then there are smartphones. The power-packed iPhone4, the Apple's blue-eyed baby, has finally got out and everyone is going gaga over it. Is it all hype or has it got what it takes to be a real head turner?

We had the opportunity recently to have a go on the new iPhone 4 and we thought we would quickly share our own thoughts and add these to the wealth of reviews you guys undoubtedly have already read and scrutinized.

Although it's not perfect, the iPhone 4S is the best smartphone we've seen yet with a great screen, high-quality camera and a slick user experience thanks to iOS 5 and a broad selection of apps from the App Store.

Some will still consider Apple's iPhone the benchmark for today's smartphones, but its revised design raises issues we haven't seen in a phone of this calibre before. Those upgrading from an iPhone 3G would be wise to consider a 3GS instead.

The much-discussed antenna issue; Design lacks the ergonomics of previous models; Not a substantial performance bump from 3GS

Zippy 1GHz processor; Retina display is razor sharp; One of the fastest cameras we've seen in a phone

You all known with the world famous company iphone. iPhone 4 has good improved performance and with more social facility available. camera quality is improved in new device. It has also enabled wifi hotspot facility. Battery life is also good compare to old device.

The fastest smartphone bar none, but its chief selling point – Siri – is a work in progress, making the iPhone 4S an expensive upgrade

The iPhone 4 is a great device.  Objectively there is simply no denying that it's a solid piece of hardware backed by good software. The screen clarity is brilliant, the touch screen response without equal and everything about the device polished.