teraomi:
Don't deals like this depend on how long you have been with Vodafone ?. When I was with them I was told that X years at X price helps your future discounts etc.
So may be customer specific.
It's not part of an upgrade. So how long you've been with them doesn't matter, but seems like a decent deal if you can squeeze it out of them.
Similar price to some cashback deals and on PAYG. However you get the minutes and it's also unlocked.
This is not to everyones liking of course and I suspect it won't get hot as its only available to existing vodafone customers.