My girlfriend wants to use a Sprint LG Viper LS840 android phone on Straight Talk. After speaking to a rep with Straight Talk over the phone and giving the numbers off the back of the phone under the battery, the rep said the phone was usable with Straight Talk. I need to unlock the phone first and every link I find doing a google search requires me to download and install software I do not want onto my pc or perform other actions. I just want to unlock the phone and if I need to pay for the service I am willing to do it, unless I can do it myself without risk of bricking the phone. If anyone can point me in the right direction I would be grateful. Also, I'm not up on all the jargon that Android phone hackers use so please be kind to me and speak english. Thanks very much.