I'm glad to see someone say this (particularly from a completely different part of the country) so I know its not just me - though in SCP its labeled as Clearwire B4 vs. TMo here for some reason. Note, this is only at home, at work or transit in between I never hit B4.
Also, my wife and I had to disable network push of phone time because of this, because when connecting to the B4 LTE carrier it kept adding several hours to the legitimate time (I actually was way late to work one morning because of this too. ? )