9100G on GB hangs daily, mine does freezing on camera use, download from market, during calls, on reboot due to media scanning, activate wifi or switch between 3G and edge. Battery drains to zero in 30 min. It also freeze when idle in pouch. When it freezes it becomes hot. Quite unusable as a phone not knowing any battery left unless i check it every 30 min. My LG Optimus is 1000times more stable. Now with ICS, it feels like a normal phone. No freeze for past 4 days, downloads. I'm not buying Samsung anymore once this S2 outlive its lifespan. Htc, ate, huawei, lg, or any Chinese brands. Six months before ICS stabilizes it. Now no complains except ram reduced from 1gb to 687mb after upgrade!