Android P Will Let Carriers Define How LTE Signal Bars Are Shown
 

XDA has discovered that the next version of Android will allow carriers to define the signal strength for LTE signal bars. It isn't clear what prompted this change or why Google complied, but many are worried that users could be tricked into thinking their signal is better than it really is. LTE signal bars are simply a visual representation of signal strength: the phone calculates the strength of the current cell signal in your location in dBm, and then parses that value and into the signal bars we see in our status bar. This gives the average Joe a rough idea how strong the reception in their current area is.
http://www.hardocp.com/news/2018/02/...ars_are_shown/