I have two questions one can I use the usb to network ie clear or cricket both have usb internet modems.
Take a look at this discussion about the same question that you have, USB Port on Slingbox Pro HD. So right now you cannot use the USB port to connect the Slingbox to the network.
number 2 can i use my phone htc evo to sling i have the hotspot . thanks
If you connect the Slingbox to a TV source (cable box, satellite receiver, etc) and to a network at home, you will be able to connect to the Slingbox remotely using your HTC Evo connected to a Wi-Fi or the phone network.
I hope this helps. Regards