Thanks for the help so far.
I asked and Cricket told me tethering was allowed and no extra charge, but that they could not assist in the setup.

I have my phone and N810 connected via bluetooth, but when I go into the connectionsControl Panel, then Connectivity, it does not show my phone connection. When I click connections, it gives me connections setup, but I do not know what to choose. When I tried this last year there was a walktrhough the told me everything to do, but I cannot find it again. I do not know whether to use GPRS or Data call, etc.