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This is a static archive of the domnit.org blog,
which Lenny Domnitser wrote between 2006 and 2009.

SMS Keypad

1 2 acb 3 edj
4 ihg 5 olk 6 nmx
7 spwq 8 tuv 9 rfyz
* 0 #

Based on Robert Edward Lewand’s Relative Frequencies of Letters in General English Plain text. E, T, A, I, N, O, S, and R are all available in 1 tap and on separate keys.

Of course, the letters do not all map to the usual digit, so spelled phone numbers (1-800-4-CHEESE) won’t work. Here is a backward-compatible version:

1 2 acb 3 edf
4 ihg 5 lkj 6 nom
7 srpq 8 tuv 9 ywxz
* 0 #

This promotes E, I, N, and S to 1 tap, but keeps N and O, and S and R on shared keys.

1 comment on SMS Keypad

1. Mom says:

Lenny, on the backward-compatible version you have a typo – “j” in place of “g” (digit 4).

I do not think version 1 is viable, but this one is a great idea!

—Mom, 14 December 2008, 18:54

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