In this feature, I look at the creeping size increases in modern 'phones' - at what point do they cease to become phones and turn into media 'tablets'? I postulate a definition that refers to the way in which these devices are used - proving that the Nokia N900 and HTC HD2 definitely aren't phones at all and throwing doubt on the N97 and iPhone in the process. Controversial? Moi?

"There have always been large mobile devices, of course. The original Psion Series 5 palmtop, by modern standards, was a huge beast. As were the first few all most generations of Pocket PC. But these were unashamed two handed devices. Either held in two hands and operated with thumbs or by holding in one hand and using a stylus.

Then we had the rise and rise of S60, from about 2004 to about 2008, its classic heyday, with a determinedly one-handed interface, enabling (for the first time) 'smart' operating systems to be used 'on the go', in traditional mobile phone form factors."

Read on