You definitely must try this. How do these people know how to work this out ?
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. Divide by 2
What number is that?