I visited my parents this past weekend, who live in a cell dead-zone. Verizon, tmobile, sprint, etc. usually get 0-1 bars, or try to roam. With .13, I was able to get 3g with a speed test of .5 down/.2up. Not blazing, but very usable.
Further, when driving between 2 LTE towers, I used to drop to 3g and stay there (if there was an active data connection). Now I either don't drop to 3g, or do so briefly and then reconnect back to LTE.
I did have problems the first 2 days with band26 on one of my local towers, but since it was apparently updated, I love the .13 modem. If you are having problems on .13, hopefully they will be remedied very soon.