Well, I tried it, and I found a few issues:
1. When typing, the response time from when I actually hit the key to when the number shows up on the screen is very slow, which is odd.
2. I hit call, then canceled when it asked me what app I wanted to complete the action with. When I returned to the app, there was this weird white keyboard on the screen that wouldn't go away.
I have a GS3.
1. It's very slow, because the app uses LinearLayout with weight. I am fixing this.
2. Which Android version are you using?