: In the "About Phone" settings, the baseband version may appear as "Unknown," indicating lost NVRAM data. How to Use the NVRAM File for Repair
Because NVRAM files are cloned from a donor phone, flashing a clean NVRAM file will change your phone's IMEI numbers to match the donor device. To avoid cellular network blacklisting, you must immediately overwrite those donor numbers with the original IMEIs printed on the box or under your phone's battery.
returns no number or a generic "000000," which prevents you from making calls or using mobile data. NVRAM Warning Error
Checking Settings > About Phone > Status shows "Unknown" under the baseband version.
Which does your Tecno KG5k use (MediaTek or Unisoc/Spreadtrum)?