Photos: Nokia E55, E75, 6710 and 6720 Navigator

In the midst of the iPhone-ripoff carnage that is Mobile World Congress 2009, Nokia seems to have kept its head and focused on its strengths. Instead of a barrage of touchscreen phones, this year's Nokia line-up goes back to what Nokia does best -- well designed, easy to use, attractive phones.

First up is the Nokia E55, a stunningly slim candybar phone that features a two-letter-per-key keypad: a first for Nokia. In addition to the compact keypad, the E55 packs HSDPA, Wi-Fi, GPS and a new and improved email client that has us very excited indeed.

If you own an E-series phone right now, you'll know the email client doesn't support Exchange folders -- the E55 changes all that. So now you have access to your sent emails, for example, which is very useful indeed. You can also access your personal emails very easily too, with just a few clicks.

In addition to being attractive and packing in tonnes of features, the E55 also has fantastic battery life, lasting for up to 28 days on standby and offering six hours talk time. If you feel you prefer a full Qwerty keypad though, never fear -- Nokia has also announced the E75, which comes with similar features to the E55 and a Qwerty keypad. Click through for more hands-on pictures of the E55, E75 and more from Nokia's 2009 lineup.

The E55 measures 10mm thick and weighs only 98g, which is impressive when you consider how many features it has crammed inside.

On the back of the E55 you'll find a 3.2-megapixel camera, which seemed to work well enough for MMS messages, small prints and Facebook pics, but we need to test it further.

Behold the Nokia E75, which boasts almost identical features to the E55, including HSDPA, Wi-Fi and the new email client -- but hides a slide-out Qwerty keypad for your messaging needs. We spent some quality time with the E75 today and have to say it has one of the best keypads we've ever used. The great thing is that when you don't want to use the Qwerty pad you can use the standard keypad on the front.

At 14mm thick it's a little larger than the E55, but it does squeeze in that Qwerty keypad. We found it still felt comfortable to carry around in a pocket, and it's much slimmer than the Nokia N95 8GB, for example.

On the back of the E75 is a 3.2-megapixel camera that, again, we need more time with to see if it's any good.

What's really impressive about both the E55 and E75 is the addition of 3.5mm headphone jacks. It's a small detail that makes a big difference.

If it's a sat-nav phone you're after, the Nokia 6710 Navigator is the phone for you. It's similar to the N95 in many respects, but much more refined. The mapping service has been improved for walking and driving navigation, there's also voice-navigation straight out of the box and you can even plot your journey for the day using Ovi, Nokia's online service, and then download it straight to your phone.

On the back of the Nokia 6710 there's a 5-megapixel camera that can be used in conjunction with the built-in GPS to geo-tag all your pics.

If you're not a fan of slider phones but you still want GPS, the 6720 Navigator offers a similar experience to the 6710, minus a few features. There's no Wi-Fi and it doesn't come with voice-navigation, but it has been optimised for clear audio quality during calls and still packs a 5-megapixel camera.

On the back of the Nokia 6720 Navigator there's a 5-megapixel camera, and as you can see, it's a little thinner than the Nokia 6710.