How could i get an unlock code for free for a htc phone

Honestly there is no free HTC phone unlock code unless you have good standing account with your network provider and have an excelent reason why you need that unlock code. If you don't have that condition your provider still take some charge for that unlock code. Charge is flexible aproximately $60-$90 depends on model phones. If you want cheaper HTC unlock code you can try to find at third party sites it can save a lot of your money and of course saving more time.