my canadian friend wants to phone me from canada, from a pay phone there, an dcall my cell/mobile phone, neone no if this is possible, and if so how it is achieveved, thank you for any help!!!!

knock off the 0 form ur mobile number, add +44 to the start (might be 0044 from a payphone over there) and bob's ur uncle. most prob will be hideously expensive

Where's "here"? If it's the uk then replace the 0 of your phone number with 0044, if it's the US replace it with 001. anywhere else, you need to look up your international code. It'll be + something, from a phone with no + symbol (ie most of them except mobiles) then the + becomes 00