my I Phone 4S is not a yr old yet I am not sure but I purchased this at the Apple store I think in May 2014 and a few days ago it started getting warm around the sim card area then the lower part of the phone on the back right near were the charger goes in its starting to get warm I can still touch it its not warm to burn you but it gets warm every so often and the battery drains out all the time I use it does Apple offer an extended battery like they do on Android phones were you can take out the original battery and replace it with an extended battery that lasts longer than the original battery but the getting warm issue is that normal please let me know what my next step is thanks