I have Mobile Broadband, but lately I haven't been getting full speed... it only connects at 1xRTT speed and transfers at about 170kbps (16KB/s) and disconnects frequently. I'm not the only person, I recommended Mobile Broadband to another person and he is having the same problems with slow speed and disconnects.
I have seen faster speeds, around 1Mbps range when my USB720 was using EVDO rev. A. Now it's always 1xRTT for transferring data.
I'm not getting what I paid for or what I was promised.