CB messages on Samsung refer to Cell Broadcast messages, which are a method of sending messages to multiple mobile telephone users in a defined area at the same time. These messages are geo-targeted and geo-fenced, meaning they are sent to a specific area and all devices in that area receive the message. CB messages are often used for emergency alerts and public warnings.

If you are receiving CB messages on your Samsung device and want to disable them, you can do so by going to the Messaging app, tapping the Menu key, selecting Settings, and finding the CB activation option to uncheck it. The steps to turn off CB messages may differ slightly depending on the phone brand you are using.