Did you wake up to a resurrected Valentine's Day text message on your phone? You're far from the only one. Numerous users have reported receiving old text messages overnight, all of them from February in one year or another (often around Valentine's Day) -- and frequently messages that didn't initially reach their destination. The zombie texts appeared across multiple carriers, including the top four US networks as well as Canada, and surfaced whether you were using an Android device or iPhones. There appears to be an explanation, although there's still plenty of mystery.