OK, I'm just trying to avoid 2 week wait for a Fios 'truck-roll' if possible. I did a search and found out that the Premier boxes require a single m-card. However, what I don't know is if the existing cards(2) in my Series 3HD unit are 's' or 'm'. I looked through all the set-up and diagnostic stuff and found no indication, so I pulled a card and still found nothing hinting at s or m. So, how do I tell? The only 'possible' thing I found was deep in the diagnostics menu where it lists 'module mode' as "s-mode". Does that mean it's an s card? I'm just kind of grasping at things 'cuz that's the only sign of s or m --anything. Thanks.