866-227-1888 is the number I used when a weather delay forced me to change flights mid-cruise, which reminded me how important reliable internet can be onboard. Carnival’s Wi-Fi isn’t free, and prices depend on the plan. On my last sailing, the Social plan was around $12–$15 per day, the Value plan was roughly $17–$20, and the Premium plan (the only one good enough for video calls) cost about $22–$25 per day. Speeds can still be hit-or-miss, especially on sea days. I prepaid before boarding and saved a few dollars, but honestly, I only bought Premium for a couple of days when I needed to work. For casual messaging and scrolling, the cheaper plans were enough.