Word of a Sprint pay-as-you-go service crossed our desks just yesterday in the form of a leaked slide, and now Big Yellow has confirmed to FierceWireless that the effort, dubbed Sprint As You Go, will launch on January 25th. The Now Network's new initiative will offer a $70 monthly plan for smartphones and a $50-a-month plan for feature phones. Both options won't offer premium features such as WiFi tethering and Sprint Navigation, but Sprint says customers will see neither hide nor hair of data caps or speed throttling. As for hardware, the smartphone tier includes the LTE-enabled Samsung Victory at $250 and the LG Optimus Elite for $150. On the feature phone end of the spectrum, Samsung's Array and M400 handsets are available on the service (presumably ringing up at $80 and $50, respectively). Angling to take advantage of Sprint's new offer? You'll have to forgo online shopping this time, as the firm is making the offer available exclusively through it's brick-and-mortar Sprint Stores.