The world’s two largest cellphone makers, Nokia and Samsung Electronics, unveiled on Tuesday their latest rivals to the iPhone as Apple became the top profit generator in the handset industry.

Apple Inc overtook Nokia in the September quarter as the cellphone maker generating the highest total operating profit in the industry, research firm Strategy Analytics said.

Nokia said on Tuesday it had started deliveries of its top- of-the-range N900, while Samsung Electronics Co Ltd announced it would launch its own open mobile platform, bada, in December as it tries to make up for a late start in the smartphone market.

Nokia and Samsung together sell around 60 per cent of all cellphones globally, but they have lost some ground to Apple and Research In Motion Ltd, maker of the Blackberry.

The N900 model is the first Nokia phone to run on the Linux Maemo operating system, which analysts see as key for Nokia to regain ground in the coming years.

"The Maemo platform, which powers the N900, reflects Nokia's need to replace its legacy software platforms with something more powerful to compete with Apple and others," said Ben Wood, head of research at British consultancy CCS Insight.

"Samsung's announcement of bada shows it has also identified the same requirement. The big question is, does the mobile phone world need yet another operating system?"

While Nokia has lost ground in the smartphone business, it is still the world's largest smartphone maker by volume. Samsung's volumes are well behind Apple, RIM and HTC Corp.

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