I recently dropped my iPhone in a pool. I am using the rice method to dry it out to see if I will be able to use it again. In the meantime, I have an old sim card and old AT&T cell phone that I am trying to use. However, whenever I turn it on, there is no service and I am unable to make/receive calls and text messages. My contacts are all loaded, so I know the sim card is inserted properly. Is there any way I can make the old phone work? It is a Samsung SGH D807 phone.