The GVoice "routing number" is most likely just the CallerID for a PRI/trunk somewhere, but I'm looking for a number that's displayed as callerID, which is different than your actual GVoice number, when you make outbound calls. I no longer have the DROID (currently have n900), but do have a GVoice dialer app. I'm trying to test if I can make either a "data only" call via Gvoice or a SIP client: 1. Without having to use a call back number, 2. Without having a Gizmo account 3. Without having to pay "extra" for being part of a "Friends and Family" plan The benefits are dependent on your situation, but should help at least a few people. If it works, worse case is that you'll have to configure a "free" pbx trunk (outlined in the sipdroid/pbxes.org instructions), and use sipdroid for calls. Anyone care to help?