Prior to the steps below GSM had shown two AT&T and two T-Mobile networks (3G and 2G).
I received my Consumer Cellular SIM (AT&T reseller). I tried it and was able to set to GSM and search for networks. It came up with four networks simply shown as network a 310 number and 3G or 2G. I selected a 2G, and that is when hope was dashed. It tried (allegedly) to setup a manual registration. That looked good since I had not yet activated the service. However, it never completed the actual connection to Consumer Cellular and eventually timed out and asked if I wanted to switch to Global and that gave me a an unknown sim card msg.
So the only thing that was accomplished is that it appeared to find the resellers network (actually AT&T) but no network name for the four choices. I want to avoid flashing since if something simple does not work it may become useless and have no value.