Samsung Galaxy Z Fold4 is a smartphone with a 7.6-inch screen that folds in half. It has 256 GB of storage and 12 GB of RAM, running on the Android operating system. The device is unlocked and can be used with any network. It comes in Phantom Black and has Bluetooth and Wi-Fi connectivity. The model number is SM-F936U1 or SM-F936UZAAXAG, and it has a single SIM card slot.