[Q] Need Unlock Code for my HTC One! topic

Hi everyone, I apologize in advance if this has been brought up before but I am just in a rush and looking for any help I can get. My brother gave me his old HTC One and I need it to be unlocked from his old network so that I can use it on mine. I was just hoping to get some members opinions for the best unlock website I should use? I know there are so many out there and I don't want to be scammed by one.

Thanks in advance!