For it's fourth-gen cellular network, Sprint plans to spend more than a billion bucks for every G.
To be titled "Xohm," the network is expected to be pulling in $2-$2.5bn every year by 2010, so it would pay for itself by 2013 at the latest—by which time it will likely be ready for replacement, the unfashionable equivalent of a 600 baud modem.
Sprint expects to sell this to 48m households, 5m SoHo users, and have it embedded in 130m consumer electronics devices.
Sprint Nextel Plans $5bn 4G expansion [Financial Times]