Help - Newbie - Samsung Galaxy s3 i535 - need to unlock topic

Hi All,
I like in Canada and i'm with TELUS... anyway i bought this phone on ebay and it was 150 dollars great deal... I have always just bough an unlock key without issue but i guess this model i535 is different ( damn you verizon)/

I just want to unlock it so i will be able to use my local Telus...

the phone is running 4.42 and kernel 3.4.0
if someone could please let me know the EASEIST way to unlock this - I have never rooted a phone before but have to learn some how! is there no other way to unlock this than rooted it?

Please reply and help!

Thank you all very much