I was curious about that too. The shut down option (the only option i see) results in the a CMD message that is like Shutting down for restart. wait for black screen. then after that message screen, it goes all digitized fade out of white slowly. then if u wait a minute, it reboots it itself. So there is no actual shutdown.
Our whole CMA received 10x10 centered at 1990 last week to widen the OG block. Pretty sweet, no second carrier yet. This and 6 band 41 upgrades added in the last year after no network additions for the previous 2 years is great.