Of course, the Mobile World Congress wouldn’t be complete without Nokia being there. The Finnish mobile phone giant took the opportunity to finally make official the rumored E75, and debut some new ones like the E55, 6710 Navigator and 6720 Classic.

The E75, as we all probably know by now, comes with a full slide-out QWERTY keypad aside from the standard alphanumeric keypad. It also comes with a 2.4-inch QVGA display, 3.2-megapixel camera, WiFi, Bluetooth, GPS, built-in VPN, 3.5mm headphone jack, and runs on the S60 3rd edition FP2. It’ll start shipping next month for €375 or $478USD.

The E55, meanwhile, is what Nokia proudly claims as the world’s thinnest smartphone. Measuring in at a mere 9.9mm in thickness, they may have a legit claim here. Aside from its ultra-slim form factor, the E55 also comes with a 2.4-inch QVGA display, 3.2-megapixel camera, compact QWERTY keypad (read: SureType), WiFi, Bluetooth, A-GPS, Nokia Maps, 3.5mm headphone jack, N-gage support and a battery that can last for 28 days on standby. It’s scheduled to ship in Q2 with a price tag of €265 ($338USD) minus taxes and subsidies.

The 6710 Navigator is a slider that looks like an updated version of the 6210 Navigator. It features a 5-megapixel Carl Zeiss-equipped camera with dual LED flash, Nokia Maps with OVI and will come bundled with the CR-111 car mount making it ideal to bring on long road trips. It’s expected to begin shipping in Q3 with a price of €300, the rough equivalent to $383 in US currency.

Last, but not the least, the 6720 Classic pretty much offers the same goods as the 6710 Navigator albeit in a candy bar form factor. This one is scheduled to become available much earlier in Q2 with an expected price of €245 or roughly $313USD.

Nokia also took the opportunity to announce a June release date for their N97, and made their app store, dubbed the Ovi Store, official with a launch date sometime in May. The N97 will be the first Ovi Store enabled Nokia phone, but they reassure us that a bunch of existing S40 and S60 users will also be able to make purchases on their handsets down the road.

Everyone will surely be keeping a keen eye on Nokia to see how well they fare in the applications business, in particular Apple who may be at risk to loosing a bit of market share. Time will tell.

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