My friend has a Droid 4 from Verizon. He says, in order to send texts, he has to save them to his contact list. A couple months ago he added someone's number but shortly after deleted the texts. A couple weeks ago he noticed, in the contact list, that this person was in a folder labeled "unknown". Is this typical? We read somewhere that it might have something to do with Skype, but he says he doesn't have this person on Skype. Any ideas why it was in an unknown folder rather than just listed at the top of the contacts like other random numbers?