5G 128G Motherboard For Samsung Galaxy S21 Plus Ultra SM-G991U SM-G996U SM-G998U | eBay
In Photos: Samsung Galaxy S21 Ultra Teardown Reveals Bad News in Terms of Repairability
Samsung Galaxy S21 Plus Motherboard Replacement - iFixit Repair Guide
Unlocked For Samsung Galaxy S21 Plus G991U G998U G991B G998B Ultra G996B G990F Original Motherboard Full Chip Android OS 128 256|Mobile Phone Antenna| - AliExpress