I'm 99% sure that it will take effect the moment the upgrade is put through, not at the start of the new cycle, and the cost difference will be prorated. A rep can tell you with certainty. I'll tag a couple so that they can reply and give you a definitive answer. :)
I'm 99% sure that it will take effect the moment the upgrade is put through, not at the start of the new cycle, and the cost difference will be prorated. A rep can tell you with certainty. I'll tag a couple so that they can reply and give you a definitive answer. :)