By some estimates it has just overtaken Motorola to become the industry's number three, behind Nokia and Samsung, its local rival.

This must be worrisome to Motorola, Nokia, Samsung and, above all, to Sony Ericsson, which concentrates on selling high-end music handsets under its Walkman brand.

Opera's mobile browser is already being shipped on millions of handsets from major mobile manufacturers including HTC, Motorola, Nokia, Samsung, Sony Ericsson, T-Mobile, and more.