So I wasn't able to use my iphone as a phone because I didn't want to be charged with data charges. I just found out that i could jaibreak it and install sbsettings and disable edge and 3g. I did this and put my sim card in and now there is a red dot over the phone icon and the voicemail icon. I tried calling myself on my house phone and it says that I'm not receiving calls at this time. Does anyone know why this is happening and how to fix it?