BenQ S660C - Manual (Page 36)

22 Getting to Know Your Phone
Alphanumeric keys
8
Long-pressing an alphanumeric key will access the function it
represents, or dial the number that has been assigned to it (shortcut
function).
Key Digit Key Digit/Symbol/Function
1 7
2 8
3 9
4 0
5 * + (long-press)
6
# P(long-press after entering
a phone number)