All of the top handset makers are getting in on the "green phone" trend to varying degrees.

Although the Android version is still relatively new, it has already been adopted by several prominent handset makers.

But I hope that model gets another chance, from other handset makers.

Changes to phone firmware from handset makers have largely corrected that security hole.

Japanese handset makers, though, have had a harder time breaking into markets overseas.

It's a concept used by many other handset makers at the show, with varying degrees of success.

"Targeting those users is huge for handset makers," he said.

Google needs to start forcing handset makers to support their devices.

For Nokia, he was credited with turning the company into the then world's largest handset maker.

There's much less scope for each handset maker to differentiate themselves, to the extent that some have questioned why they would even bother.