Nokia X, X+, XL, and X2 (Nokia's early customized Android attempts).
If 6.2.55 cannot fetch firmware, download the .nb0 firmware file manually from LumiaFirmware and use the “Offline mode” (not officially supported but doable via folder replacement). Nokia Software Recovery Tool 6.2.55 Download
While it often wipes user data during a "recovery," it is designed to restore functionality. Nokia X, X+, XL, and X2 (Nokia's early