I have a Samsung Galaxy S4. The past couple of weeks it has started acting weird. It will start beeping while I am on the phone talking to someone. It is like I am pressing numbers on the keypad but I am not. It will continue to beep while I look at the phone. It has been doing this at least once a week. Can anyone help? Someone told me that I should do a factory reset on my phone. What is the best way to do this? One said use Kies and another one said use gmail. Any suggestions?