Age prediction by cell phone

1. Right last four digits in your mobile number. (**********6200)
2. Then right that same four digits numbers in another pattern as you wish. (2600)
3. Then you have two, 4 digits numbers (6200, 2600). Now what you have to do is reduce the small number by large number. (6200 - 2600 = 3600)
4. Then add all the digits in the answer until the final answer to set as one digit. (3+6+0+0 = 9)
5. Add 16 to the answer (25)
6. Add birth year to the answer (2005)
7. Then reduce 25 from the answer (Answer= Birthday), enjoy!!!