Sprint’s XOHM WiMAX launched this morning in Baltimore, and we’re hopping on a train bright and early tomorrow to test it Possibly also while paddleboating in the Chesapeak. Mobile WiMAX, a fourth generation network that will compete directly with Long-term evolution (LTE) networks backed by the likes of Verizon Wireless and AT&T, aims to deliver broadband downlink speeds in the 2-4Mbps range within the 2.5GHz spectrum. XOHM works a bit differently than other wireless broadband services, too. You can pay for day-passes when you need to use the service, and there aren’t any contracts that you have to sign. Also, devices can share a single XOHM payment plan, so your internet tablet and computer don’t need separate accounts. We’re heading to Baltimore tomorrow to pick up some Samsung Express air cards ($59.99 each), but modems are also available from ZyXEL for $49.99. We’ll also be bringing along a Nokia N810 WiMAX edition internet tablet. You can follow our experience here on the blog as we sign up for a $10 day pass online ($25 home service and $30 monthly packages are also available) and roam about Baltimore testing the network.