Yea, hold off on building an entire new Voip app for the tablet Is it alternatively possible to do any of the following: 1. After placing a call, the dialpad could be linked somehow to the internet call's dialpad to send the tones, or 2. Once a call is placed, the internet call app opens, but instead of clicking on the menu and selecting dialpad, it is automatically opened for the user. If none of those are simple to implement don't waste your time. Just a lazy suggestion.