Input methods:
En: T9 Predictive, first letter cap then
small letter
en: T9 Predictive, all small letter
EN: T9 Predictive, all cap letter
Abc: Corresponing keys once per
letter, first letter cap then small
letter
abc: Corresponing keys once per
letter, all small letter
ABC: Corresponing keys once per
letter, all cap letter
123: All number input