In as much as it's normal for a device to get 'warm' during use, getting hot is really a big issue. I'm facing the same problem, here are my observations so far: when you have a poor signal reception, your phone gets 'hot'during use(web browsing, games, texting, calls)nO can assure that nothing is wrong with your battery or the phone. 2, try to connect to a Wi-Fi and see if you experience the same while on 3G. 3, download 'ookla' app and run a speed test. The phone don't just get hot, the battery drains like a count down. Trust me I know what you're facing. You can get back when you find a solution, your could also walk in to apple store who knows might be hardware problem.