Two questions: 1) After reading several reviews, it seems that in 4G areas/use the battery lasts about a half to full day. This is very concerning to me especially since I'm in a 4G area and would like to take advantage of it. Has anyone had experience with the phone in a 4G market and used 4G heavily in 1 day? 2) Are the ringers loud in addition to the speakerphone? Can you hear the phone ring at its highest setting on a busy street? I had an iphone 1st gen and even with the ringer at its highest volume, I'd miss a lot of calls.