How do i change my pin number?

hey! alright well i got a new phone %26amp; has missed place my other cellphone. but it says i have 254 backup contacts %26amp; i would really like to get those back but i have no idea what my pin number was. so is there any way you can find out your pin number or reset it or somthing? please help, thanks :)|||you can call your network company and identify your self to them and the will give you the number or if you know your PUK number it%26#039;s even better, enter the pin code 3 times wrong then when it ask for the PUK just enter it and enter the new pin code,,