I think I've already proven that BB is NOT the only secure messaging/app platform. Which bit about SSL encryption did you miss? Or using IPSec tunnels?
You can configure how WM syncs with the mailbox but only deltas are sent OTA. Same with attachment handling, you get a header and can choose to download the whole attachment if you want to. So if anyone is syncing gigs of data OTA then it's down to ignorance and poor config - certainly not an advantage of BB over WM.
Two tariff's?! I think that's a bit of BB marketing hype. I grant you battery life isn't as good as BB devices but necesitating an extra phone?! Ppfffttt!
I was just involved in the infra design for a large corporate moving from BB to WM and we are seeing more and more of it. The same in the US. And they don't use two tariffs.
I think you've got some old marketing data there big guy
