Typing on a foldable keyboard feels particularly challenging when you regularly switch back and forth with a non-folding one.

The most notable feature is the unique fold-out QWERTY keyboard. Also features video clip recording, EDGE, Java, speakerphone, and voice dialing. The 6820i adds Blackberry push email.

For comparison, the current iPad Pro caps out ... on a folding iPad, as he previously covered a rumored 20-inch iPad meant to work like a MacBook, but with a touchscreen instead of a keyboard.

Typing comfortably on a Smart Phone is best done using ... That’s when the Palm Portable Keyboard (PPK) caught his eye. It’s small enough to fold up and fit in a pocket, yet unfolds to ...

An Android phone that slides open to reveal a physical ... The Nokia 950 had a slide-out keyboard hidden beneath the screen but was only ever given to app developers. Mr Chen said he used it ...