We're doing about 40 of these 4620L Mifi's at my company. I've been watching closely since my first post weeks ago. Last week, the update did show up...this week it does not.
I see Verizon still has the instructions on how to update to the 3.20.03.01 here: »support.verizonwireless. ··· 20l.html
if you look at the "Software update instructions", you'll see them mention that firmware version exactly.