Free alternative to the paid version of Spotify for 12 months.
It enables to download music to your device so that you can listen to it offline as well as other features.
All you need to do is to register an account (should work with existing accounts but I'm not 100% sure) on any browser and then go to the "An EE customer with a Deezer offer? Activate now", follow the instructions and you'll be sent a code to your mobile. Put that in and you're all done, free for 12 months.
If you have friends or relatives that have one of these contracts but don't use music streaming you can get them to get the code and you can activate the freebee yourself as there's no link between email addresses and phone numbers.
Edit. This doesn't appear to work for every EE contract, but it's worth checking if it will work for yours! If it gets a couple of people a 12 month freebie then it was worth me posting ;)