Well, not sure what you call it (GSM?) but I finally got one and it works. I got mine from Telcel--about $50 usd a month. I am sitting at my ranch in the woods typing this message. As usual, nothing was easy or fast. I have had a contract with Telcel for my phone for years so I set my faithful assistant to get me the gizmo (don't tell them how technically challenged I really am RG!) to be able to connect from anywhere--figuring that "you can't get there form here." However, her persistence paid off--after 2 months I have it and it works. The first thing they did was sold me the usb thingie and told me all i had to do was put in the sim card from my cell phone to make it work! Well, not having a phone so I could have the other was NOT what I had in mind so after much more paperwork or making another contract, they provided me with a blank sim card and I am now online from the jungle. I have the cutest new orphaned pinto baby lambs, the carpenter is installed my new doors completely opposite from what we had agreed upon and all is right with the world.