HTC Jetstream was created in 2011-09.
The HTC Jetstream, to the best of my knowledge does support 4G networking, however to get the best answer ask a salesperson in a store, and read the box to double check.
Jetstream - comics - was created in 1984.
Jetstream Express was created in 2007.
Toonami Jetstream was created on 2006-07-17.
Jetstream - song - was created on 2005-05-16.
Jetstream - roller coaster - was created in 1964.
Jetstream - TV series - was created on 2008-01-08.
To stop your Jetstream from freezing, try a soft reset. Also, be sure to consistently clear your list of running applications, closing them doesn't clear them.
HTC was created in 1997.
HTC Tattoo was created in 2009.
HTC Rezound was created in 2011.
HTC Magician was created in 2005.