Today T-Mobile announced the availability of its first 4G Mobile Hotspot, the T-Mobile 4G Mobile Hotspot. This device will allow you to connect up to five Wi-Fi compatible devices to it with accessibility to T-Mobile’s 4G network. The 4G network will allow theoretical peak speeds of 42 mbps in Las Vegas, New York, and Orlando, and 21 mbps in all other 4G covered areas. The network has said that it would like like to double the 42 mbps compatible cities. The T-Mobile 4G Mobile Hotspot will be available beginning tomorrow, April 13, for $79.99 after a $50 mail-in rebate and a new two-year contract.