I have a few questions, if anyone has some experience with this setup. I have home VOIP service with Broadvoice on their Unlimited World Plus plan. I also have their Multipresence service which allows a 2nd device/App on an Android/iPhone. I have tried several apps (3CX, Airdroid, aSip, Sipdroid). I can get most of them to work when I'm on WiFi, but not on 3G, or 4G. Questions: 1. If anyone has them working on Broadvoice, Sprint, and an HTC EVO (or other Smartphone), will you please post all of your settings except your User Number & Password)? 2. Do you know if Sprint has some kind of block on using Voip with 3G/4G? 3. If you have this working on Broadvoice, what App are you using on your phone?