I feel the same with my S2. Spend some time on xda and you have android 6 running on it. It's not even slow except when you're switching between big apps becaus

I feel the same with my S2. Spend some time on xda and you have android 6 running on it. It's not even slow except when you're switching between big apps because android have to kill them when they are not in use thanks to the 800mb of ram. I also bought a 3500mha battery and it lasts the day.