I just bought a Verizon Network Extender. When I dial #48 it says I'm within Network Extender range. When I make a call my signal bars jump from 0-1 to 4-5. When I end the call it's back down to 0-1. Is this right? I was hoping the extender would help with my battery life as it wouldn't be constantly struggling to keep a good cellular connection. However, this doesn't seem to be the case if I'm only seeing the signal benefit when on an active phone call. Am I missing something? Thanks!