Well, I don't think the Zync is upgradeable. But from what I have read, if you have the Green card, and you have some hisotry built upon it (i.e. you have had the card for 6-12 months) and everything looks good, you can ask them to upgrade for you to the Gold, because I have heard they use the same underwriting criteria for all of their charge cards. However, it is another inquiry if you do get approved for the Green, because the Zync for some reason is/was not allowed to be upgraded.
