Need help in choosing a connection card? We can help make sure you get the best card for Sprint's Mobile Broadband Service. First make sure you you have coverage where you plan to use the service, then either call us and we'll help you pick a card out while placing your order, or complete the order form and request assistance in your card choice (Click "no" under Card Compatibility Question), and we'll call you to help you choose a card. We guarantee we have a card that will work for you. Choosing a connection card that matches your current computer's configuration is just half the battle. The other half is matching the connection card to your specific needs. We're mobile broadband specialists...we can match you with the best cards, and usually save you money in the process. Sierra 250U 3G/4G Access to 4G speeds that are up to 10x faster than 3G Dual-mode 3G/4G device, access to dependable 3G speeds and accelerated 4G speeds where available 3G speeds where available GPS Navigation enabled Web browsing capable Email capable Windows Vista, Windows XP, Windows 7, MAC 10.5 and 10 Easy Install USB Card - Plug and Go - Works in laptops and desktop FREE with Mail-in Rebate View Details Sierra Overdrive Access to 4G speeds that are up to 10x faster than 3G Dual-mode 3G/4G device, access to dependable 3G speeds and accelerated 4G speeds where available 3G speeds where available GPS Navigation enabled Web browsing capable • Pocket-sized personal hotspot! $99.99 after Mail-in Rebate View Details