In Singapore, the mobile phone penetration is over 100% meaning everybody is likely to have more than a single phone. Besides making phone calls, the most common used feature is the SMS or texting.
Typing SMS is slow on the phone because
a) Using numeric keypad to type is not natural. Although some people are versed, it is simply not natural to type in number keypad.
b) The full QWERTY keyboard, either onscreen or offscreen is too tiny. A mobile phone has
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