4now doesn't specify where he/she is. AT&T in the U.S. is one of the few carriers worldwide that doesn't allow tethering. 4now's carrier may be one of the carriers where it is 100% allowed and supported.
If that is the case, I would recommend 4now contact Apple and/or your carrier for support on this. When I had tethering working on mine, Bluetooth tethering stayed working, all I had to do was select my phone from the Bluetooth drop-down menu item, and choose "Connect To Network" to connect.
Also, if I plugged in via USB, (and had USB tethering on on the iPhone,) tethering was automatically enabled the entire time I was plugged in.