A couple of observations.
1. I almost always get booted right before taking down Alessandro. Solo, in a group, doesnt matter. I can get through Gustav a bit more regularly, but when the boot comes its right before he is defeated.
2. Does the Galaxy S2 you use heat up right by the camera when playing? Mine does.
3. When I had an EVO I would get ping spikes and rare crashes when texts came in. Same as this phone.