“Nokia is back!” This was a declaration in the opening of Nokia World event in London this week. The unveiling of four Symbian smartphones N8, C6, C7 and E7 was witnessed by 3,000 participants.

Niklas Savander and Anssi Vanjoki voiced that Nokia has endured much criticism in their competition with Apple and Google, despite their lead in device sales with 260,000 Symbian smartphone per day. Nokia is up to proving that “connecting people” is more than just a tagline, and that Nokia ”invented the smartphone,” as added by Savander. But Nokia also recognizes that some things do need to change. The handset manufacturer is fighting back, with the newly introduced handsets labeled as the “new Symbian platform”.

Vanjoki demoed the new N8. Dubbed the “entertainment powerhouse,” the new N8 features a large touchscreen and 12-megapixel camera with mechanical shutter. General-purpose devices, Nokia’s C6 and C7, have fundamental smartphone features, such as integrated social networking tools, location-based services, email and browsing. But “the ultimate business smartphone” which is named the E7, appears to be more interesting for today’s ever-updating market, as it fuses business with personal use. The E7 dons a 4-inch touchscreen that hides a full QWERTY keypad, with deeply integrated support for Microsoft Exchange.

Nokia also plans to use MeeGo platform for its newest mobile devices, an effort Nokia’s been building up for some time. For now, the company still settles for Symbian^3, but expect more news around MeeGo later this year. Nokia is facing an uphill battle in the consumer market, and has already made top-level executive changes after seeing a sharp decline in shares over the past year.