We will copy the file cal_data_hg556.bin to the folder “/etc” in the router and we will have it available to restore the calibration data. Use WinSCP to transfer the cal_data backup file to your computer. Now backup the mtd that matches to the cal_data partition, mtd5 in all of them.ĭd if=/dev/mtd5 of=/etc/cal_data_HG556.bin Use the method “OEM easy installation” to flash 17.01.4 version, cal_data is not destroyed, and wifi is fully functional. There is an easy way if you flash from stock firmware.
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