06-11-2008, 07:03 PM
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I had some difficulty getting my Sprint 8830 to tether as well, but it ultimately did. If I remember correctly I had to uninstall the Desktop Manager and all drivers, etc., first, then install the Connection Manager, and then install the Desktop Manager.
As for tethering in the UK, make sure that your client has an international data plan with tethering enabled. With the GSM component I would probably try to have a manual configuration and avoid the Sprint connection manager. Not sure why I say this, just somewhat suspicious of the effect that Connection Manager might have on the process.