The only time I have seen the hollow bar in the past few days is when I am traveling to and from work, and it only happens when I am right by electrical towers. As soon as I am past them, it goes back. Not by much but it moves ever so slightly. I have not seen them in my house yet for the past few days. Prior to this I used to see them in various rooms. Been going into those rooms where I had the hollow bar and not able to currently produce the bars.
Over all though, I am still seeing -114dBm to -110dBm practically everywhere. I can start off with -114, move the phone to my other hand and it jumps to -110 and -108 the lowest. Way too much fluctuation with very little movement as far as I am concerned. Very unstable no matter how I look at it. Tested a few phone calls tonight without Wi-Fi and Airplane mode. Dropped both of them after several minutes. Enabled Wi-Fi and Airplane mode and no issues of course. As far as I am concerned it's going to take a little more then just a few points of dBm to make a significant difference. The real test is the calls, which unfortunately I am not able to make unless I am on Wi-Fi with airplane mode toggled on. My signal bar does move around quite often without any kind of favorable results. Moves too much to the left and not enough to the right for my taste.
When I can make a normal phone call unassisted in any way from my office which I could with any other phone I have ever used, then I will see things as getting accomplished. Until that day, it's still a failure