Looking for a reliable replacement part for your Samsung Galaxy S21 (G991U) US Version? The Mainboard Flex is an essential component that ensures stable connectivity between your device’s motherboard and other critical hardware. Whether you’re repairing a damaged unit or upgrading for improved performance, this flex cable is designed for durability, precision, and perfect compatibility with the Galaxy S21 (G991U).

At Gadget Break, we provide only high-quality and tested parts to give your smartphone a new life. With this Mainboard Flex, you can restore full functionality to your Galaxy S21, eliminating issues like poor signal, charging errors, or connectivity disruptions. Easy to install with professional guidance, it’s the ideal solution for technicians and DIY repair enthusiasts who want long-lasting performance.