To add, to this, as I stated before, I have Ntelos and it will roam on the airave. But if the phone gets the slightest hint of a Ntelos signal, then it will use that signal (of course that what it's program to do). The Ntelos signal is unusable. I got the airave in hopes that the stronger signal would stop jumping from a Sprint tower to the unusable Ntelos signal. It did help with it, but I still jump signals from Ntelos, Sprint tower, airave.
If I could only get one of those RF cancellation boxes all around my house.