Model: Galaxy Z Flip4. Storage: 128GB. 🔓 This device is Unlocked to work with any carrier 🔓. Color: Graphite. Manufacturer: Samsung. Battery Health: Minimum 80% Battery Health. Device Information. Since 2009, YYWireless has been a trusted supplier of a wide range of cell phones, tablets, computers, and accessories in various conditions—new, certified pre-owned, refurbished, and used.