Try this (Works on Malaysian HP numbers, not sure of others) …

1 ) Key-in the first 3 digit of your handphone number (not the 01x number) into the calculator
2 ) Multiply by 80
3 ) Add 1
4 ) Multiply by 250
5 ) Plus last four digit of phone number
6 ) Plus last four digit of phone number again
7 ) Minus 250
8 ) Lastly, divide by 2

Whats the answer? Is it your handphone number????

AMAZING ISN’T IT !!!