Apple iPhone 4 review: First look

If you couldn't get your hands on an iPhone 4, or if you simply couldn't bear the idea of waiting in line for one, you might still be feeling disappointed. In reality, few in the world has held the new iPhone, never mind spent any time with it. We got one on launch day, and here are our initial impressions.

After a day of extensive use, we've noticed how responsive the iPhone 4 is. It's likely down to the combination of Apple's A4 processor and, according to teardown reports, twice as much RAM (512MB) as the 3GS. There's also 802.11n Wi-Fi, though it only works on 2.4GHz networks with a lower maximum speed than those running on the 5GHz band.

Aside from that, it's the new design of the iPhone that's most striking. Beyond the front face, it's a marked departure from the ergonomics of all three previous generations, as it's flat on all sides and edges. Only the corners are curved.

iPhone 4's edges aren't sharp, though. The glass front and back are slightly inset from the metal frame. It's 3mm thinner, but it doesn't feel like it fills the curve of your hand as well as the older ones, unless, perhaps, you have exceptionally small ones. And there's the rub: it took mere minutes to appreciate the curved back when it debuted on the iPhone 3G. It's a shame to see the previous design almost entirely abandoned.

Like the original iPhone, the new one takes a step backwards to feeling like an object with a reassuringly rigid but slab-like form. We urge you to handle one in store and compare to previous models and determine how comfortable the leanness is for you. It will be a very personal decision. Even so, if you're coming from another flat-backed phone, it's not something you should be especially concerned about. It's mostly jarring for iPhone upgraders.