I port my sprint number to my Google voice number, if I keep it that way for 90 day's my Google voice goes away. I've had Google voice since it first came out, I like my custom number but I'm not ready to go to it fully. So I disable the port before the 90 days for an hour, redo it am I'm good for another 90 day's. Recently I became disabled, once all my paperwork is approved I may comment to the custom number..... maybe.