Losing your IMEI numbers (resulting in “invalid IMEI” or no network signal) requires writing to the NVRAM partition. Most tools require authentication to access these secured regions.
Select the MTK_AllInOne_DA.bin file in the "Download-Agent" tab. Load your . tecno in5 auth file
Advanced users can extract the auth file from a full official firmware package (usually distributed as .zip or .pac ). Inside, you might find an auth_sv5.auth file or similar. Losing your IMEI numbers (resulting in “invalid IMEI”