I tested PdaNet with my T-Mobile-provided G1, and it worked as advertised. PdaNet supports both 3G and EDGE connections, along with Wi-Fi for, we'd guess, older laptops or traveling desktops.

How to Troubleshoot PdaNet for Android. When you troubleshoot the PdaNet application on your Android phone, you may save time spent waiting on an answer from customer service. The tethering ...

Turn your phone back on and connect to a Wi-Fi network. Open the Android Market, search for, and install the previously carrier-blocked app. Turn off your phone. Pop the SIM card back in.