Sprint has just introduced the U300, its first-ever dual-mode 4G/3G modem. The tiny USB modem is built to enable its users to make the most out of Sprint’s EV-DO network inthe United States. This goes the same for Sprint’s WiMAX 4G network that is based in Baltimore.

Sprint also announced that the gadget will be available for sale in Baltimore starting December 21 of this year at a reasonable price of $149.99 after a 2-year commitment and a $50 mail-in rebate.