Double Data: Buy 3GB offer and get another 3GB free.
Free Upgrade: Buy 6GB and get another 4GB free.
Free Upgrade: Buy 10GB and get another 4GB free.
Free Upgrade: Buy 14 GB and get another 6GB free.
Free Upgrade: Buy 20 GB and get another 8GB free.
Free Upgrade: Buy 28 GB and get another 12GB free