ok, so this may be a little late. But this worked for me.
1. Go To http://www.battlefield.com/battlefield-4/premium-membership
2. Select xbox one. (This should bring you to the xbox.com site.)
3. Log in and return to the original page for premium on the xbox site
4. It should show up free
Ok Guys,
Basically as seen on the link above to the battlefield .com site, Premium transfer has been extended for 360 users who upgrade to Xbox One and the July 31st 2014 deadline is no longer in force.
You will still need to purchase another copy of the basic game though.
As always any problems contact EA Answer help center or MS support..
