Tecno KB2J Baseband unknown issue????

I got a tecno KB2J mobile with Baseband unknown issue. I tried this KB2j-H613G-O-181219V64 Upload By GD_Mekail92 (Google Drive - Virus scan warning) firmware with format all & download in Tecno flash tool Tecno Flash Tool v4.1806.11.11 BY GD_Mekail92 (Tecno Flash Tool v4.1806.11.11 BY GD_Mekail92.rar - Google Drive) but still baseband is unknown any solution sugested is greatfull . Please

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