Wally will not work unless it sees all three satellites. It took a while to figure it out and I am very disappointed. Not sure when DISH will fix the issue if it will be fixed at all. Basically, the "checking switch" screen will stuck forever. It will not give you a warning or notice. When I had VIP211z, at least 211 would give you a choice between rescan or go forward with limited channels. Not on Wally, you cannot move forward unless it sees 3 satellites.
Check switch menu is buried in the setting but if you power cycle, it would come up automatically