To get upgraded on Carnival, keep an eye out for email offers through their Upgrade Advantage program, where you can bid on a better room. Carnival's upgrade policy also includes occasional free or discounted upgrades during promotions. For a Carnival cruise room upgrade, being flexible with your cabin location helps, and you can even ask about availability at the port during check-in... https://herbalmeds-forum.biolife.com.my/d/277294-how-to-get-upgraded-on-carnival