Does it have anything to do with data dropping from H to 3G? This shows as network type HSDPA:9 then dropping to UMTS:3.
How do you ensure its disabled, when it seems different for each device? Samsung seems to have their own way of toggling it. As does LG, per carrier in a sqlite database. But that doesn't exist on my Nexus 4.
So I tried a build.prop edit:
But I'm not sure if this does it.