setting > mobile network > highest connection speed drop down
hspa is 3g so just switch to that
On my 920, I don't see "setting > mobile network >". I wonder what the deal is? I would love to see if I get a better tower at the house on 3g rather than 4g.
go to Settings > Cellular, on my phone its the 10th one down from the top. In there you can change the Highest Connection Speed