Download LYF Wind 2 LS 6001 Stock ROM or Flash File and flash it using Recovery mode through Stock Firmware.
Lyf_LS6001_R21_R31_5.1

  1. Rename the file to Update.zip
  2. Place it in sd card
  3. Press & Hold Power + Volume UP
  4. Shift to recovery mode.
  5. Select apply update with sd card