I have a 640 that I use on Consumer Cellular. The phone works great and they have great prices. However I am having a problem with sending pictures with text messages. I called them and we changed the APN codes and I can get on the internet using cellular data and even receive pictures with text messages but I cannot send them. Everytime I try I get a message that I cannot send the message and to try again. Tried many times but no positive results. They do not fully support Windows phones on their network; but I have heard that some people can both send and receive pictures with text messages on their network (which is AT&T) using a Windows phone . If anyone has the proper codes to make this possible I would love to have them. I would even send those codes to the tech people at CC so they can give them to possible customers.