Why is it that my SGS2 suddenly got heat up quickly for the past 3 days? It happened only from 6pm onwards and drained my battery seriously fast. Today, i fully charged my phone at 6pm and now at 11pm the battery is already fully drained up. I didnt install any apps recently nor turning on the wifi 24/7 since im having my final examination. Just bought the phone 4 months ago, no rooting has been done.

Need help here. Cant focus on my study like this