i have a sony Ericsson k770i and want to sell it but need it unlocked is there anyway i can do this for free?

its a k770i vodaphone and my imei number is 35617902-064678-4-67
i will be very happy if you can help
i need it to be free and i mean make the phone sim free

Hi did you know that by advertising the imei no. on here is 1 way of getting your phone cloned (copied) ! the imei no. is the identification of the phone a bit like the identification of a car the easiest & safest way to unlock a phone is pay around £10 to have it unlocked at a second hand phone store or your local market stall that unlocks phones … sly

How To Unlock any Vodafone UK Sony Ericsson