How much b41 is there where you are? .. If there is a lot of b41 there your phone will want that 1st and if the signal is strong enough the iPhone 6 will go to it quickly .. I pick up b41 a fair amount because alot of old Clear sites as well as some Sprint NV sites ( which I may or may not have encountered) have it around here, but b41rollout is now being done by what Sprint deems the areas that need it first instead of America all at once.. So I'm hoping b41 work doesn't stall here in Columbus .. But if b41 isn't around you'll latch onto 1900 mostly