The folks at NUU Mobile have a new smartphone for the United States, one by the name of NUU Z8. Have you heard of NUU before? No? You're not alone. This smartphone company isn't the type that competes directly with the likes of Samsung and Apple. Instead, they create smartphones inside the United States that are unlocked and available to work on a wide variety of networks. Everything from AT&T to metroPCS to Cricket Wireless to T-Mobile, with a whole lot more in-between.