Sprint Nextel opened a new wireless network to customers in Baltimore this week, offering Internet service for laptops for $45 per month. It’s Sprint’s first deployment of WiMax technology. WiMax is akin to Wi-Fi, but covers much greater distances.

Sprint calls its WiMax network Xohm and offers speeds of 2 to 4 megabits per second, about twice as fast as cellular broadband networks from the likes of Verizon and AT&T. To use the network, customers need a $60 laptop card or an $80 home modem.

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