Typical smartphone keyboards are modal. There is usually a basic QWERTY/Basic punctuation keyboard by default that can be switched to numeric/extended punctuation mode.
This works reasonably well until we get to the issue of entering a Canadian postal code of the form "L2L 2L2". (Casing and the space are unimportant.) In order to enter a code, the user has to toggle the keyboard mode 5 times, making the input extremely clicky.
One alternative would be to provide 6 option lists, (A-Z, 0-9, A-Z ...), but the alpha lists would be quite long, and might not fit on the screen.
Has anyone looked at this problem, and what alternatives did you come up with?
Answer
I'm not from Canada but you could check the possible combinations and just provide the keys that are possible after typing or selecting one character.
K1A 0B1
Letter Number Letter Number Letter Number
Also here make sure just to display the possible next letter or number.
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