Just got my new LG G4 phone today at the Verizon store but have not been able to figure out how to turn off the ringer but still leave my phone on so I can check time, etc. during the night. I sure do not want calls at night or in meetings, etc. Is there a quick, easy way to turn the ringer on and off? How about all sounds? This was much simpler on my old Samsung Reality! Thanks.