Hi good afternoon, my nickname is Little Crow and I need urgent help. Forgive but do not speak English very well, I'm from Argentina and I will do my best to make me understand. I tell you that I purchased in the U.S. the GT540 Optimus LG, unlocked and new Argentine, for use inside. Comes with Android OS 1.6 and wanted to know what I have to do to upgrade to version 2.1 and use it in Argentina without any problem. Pros and cons that I can get to be given from which the cell and where I'm going to use? I hope answers, I'll be aware of them. I wish I could help, I'll be very happy if so. Of course, thank you very much! Good year and happy holidays! Little Crow PS: If something is not understood, please ask me my answer them as quickly as possible!