Worked on stabilizing WAN connectivity for the Phicomm K2G router in the namiltd/openwrt repository by addressing a device tree configuration issue affecting the RTL8211F PHY. Focused on embedded systems and DTS, the developer delivered a targeted patch that corrected pinmux settings, ensuring the rgmii1 interface could reliably obtain a DHCP lease and pass network traffic. The solution involved clearing the bootloader-preserved GPIO state to select the correct WAN PHY pins, with changes validated through hardware testing. This work laid the foundation for more robust WAN PHY pinmux handling in future RTL8211F-based designs, improving maintainability and preventing regressions.