Hi, I have a legacy prepaid account and I'd like to receive calls and mostly SMS when I travel to Chile. It used to be possible to connect to a local carrier (Movistar) but now I get an error message saying that the “SIM card does not allow a connection to this network”. I've read in other posts that roaming for prepaid has to be "enabled”. I've called customer service to request enabling roaming for my prepaid number but the agents don't seem to know what I'm talking about. How can I reach a knowledgeable T-mobile agent that can help me?