Iphone 4 ios 6.0.1 baseband 4.12.02 can i unlock?

I have an iphone 4 locked to t mobile and i have a vodafone sim and i'm on ios 6.0.1 with a 4.12.02 baseband, is there anyway i can unlock my phone for free?

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don't' need ebay or paypal accounts either… Viola… You have a factory unlocked iphone.