you might want to try R11A02
I just test R11A04 and R13A02, they both gave me worse signals and I end up not able to connect to any 5G bands unless I have my modem right up against the window facing the cell tower. Even then the speed is 30-40% less than R11A02.
Once I revert back to R11A02, all is well again and was able to keep the modem at a location I wanted. I will probably go back to R13A02 once I get some yagi antennas and try again.
BTW this is my experience with Tmobile in south Florida USA