A few hours ago -- mere days before a joint Samsung and Boost Mobile event scheduled April 5th in New York City -- we received a 19-page document from Sprint's Prepaid Group outlining the updates and devices coming to Boost Mobile and Virgin Mobile this month. The piece de resistance in this document is the Galaxy Prevail, a Samsung phone that's been rumored for a couple weeks now. Details are scarce, but spec-wise it looks like a low-end Android smartphone with a 3.2-inch touchscreen and a 2 megapixel camera. As such, it's similar to the Galaxy Gio, but with a CDMA radio and a downgraded shooter. The Galaxy Prevail will be Boost Mobile's first CDMA Android smartphone and will be priced at $180. Boost Mobile will also begin volume sales of the Samsung Factor, a simple clamshell phone costing $50, and will offer new international flat-rate packages starting April 11th. The document also highlights a couple of devices for Virgin Mobile that are already available from parent company Sprint: the Samsung Restore, a QWERTY slider that will sell for $80, and the ZTE Peel 3200, an iPod touch case with built-in 3G hotspot that will retail for $100. We don't have any details on availability other than "April", but you can take a look at the leaked document in our gallery below.