What phones will display Hotmail subfolders?

We have a a Motorola Droid that displays Inbox, Sent, Outbox, Trash, but no subfolders I created.  Verizon told us that, while Motorola's system will not display Hotmail folders, Samsung's will.  It's important to me that I can access subfolders.  We're about to purchase new phones and I;d like to verify whether this is true.  Are there certain cells where Hotmail's app allows viewing subfolders or is this a pervasive problem with the Hotmail app?  Thanks!!