Republic Wireless is pretty candid that it's still learning the ropes of the mobile world, but with its monthly service cost of $19 per month, we know more than a few people who'd like to help test the water. Most recently, the company admitted an error with its deployment of a single-band Motorola Defy XT, which is compatible only with Sprint's 1,900MHz network. While this is fine for many -- especially given that subscribers are primarily expected to use