The Sim Card Reader for Samsung S21 Ultra 5G (Soldering Required) is a high-quality replacement part designed to restore full SIM card functionality to your device. If your phone is experiencing issues such as SIM card not being detected, frequent disconnections, or damaged pins, this reader provides a reliable solution. Engineered for precision compatibility with the Samsung S21 Ultra 5G, it ensures a stable connection once properly installed. Please note that professional soldering is required for installation to avoid damage to your motherboard or device.