1.The device must be turned off, so hold down the Power rocker for a while. 2.Afterwards press and hold together Volume Up and Power button for a few seconds. 3.You can release held keys when you see an Android Robot.To enter the Recovery Mode hold down the Power key for a short while. 4.In the next step use Volume buttons to select "wipe data/factory reset" and tap the Power button to confirm.5.Afterwards choose "yes" from the menu, and accept it with Power button.6.After a while accept option "reboot system now" using Power rocker.
Heating issues are very common now days the more powerful a phone's hardware the more it heats up. It's just like our PCs the more it works the more it heats up. However it cools down once you close all the apps and keep it on standby mode.