: Formerly known as Phone; contains the modem firmware for cellular, Wi-Fi, and Bluetooth connectivity.

Prior to Android 10, Samsung resisted the seamless update system used by Google Pixels. However, with the Galaxy S10 series and newer, Samsung adopted a pseudo-A/B partition scheme. Odin 3.15 introduced smarter handling of these dual-system partitions, reducing the risk of flashing the wrong slot and bricking the device.