After performing this Experiment

1. You will understand interaction efficiency of various numeric keypad layouts.

2. You can compare different keypad designs based on the results obtained and graphs.

3. You can inspect the effect of entering different mobile numbers using same layout.

Note: Mobile users normally do not dial but store numbers in contact-list / phone-book.This experiment finds out the usability problems for novice, illiterate and elderly users, who rarely use phonebook to select numbers to dial.