Speaking of which, if I can add a question to this thread... I want to switch from Claro to Movistar on Pre-pago AND bring my number over too. I went to the official Movistar shop on av. Cabildo in Belgrano, and they told me that to switch my number over too, I will have to wait until mid-March when that option becomes available. (at no extra charge). I'm going on a trip so I thought I'll wait til I get back in mid-April. But my question is, how much can I expect to pay, especially since it will be directly from the store? I believe I got my Claro chip from a kiosk second hand for really cheap (can't remember as my porteño friend wouldn't let me pay for it- but I remember it being cheap). Thanks for the help if you know!