Firmware Tecno Spark 20 Pro -

zyGrib is a cross-platform application for visualizing and analyzing meteorological and oceanographic forecast data stored in GRIB format (GRIB 1 and GRIB 2). It supports offline usage and automated downloads from major forecast providers. militaryclassified.com

Firmware Tecno Spark 20 Pro -

I understand you're looking for firmware for the (model likely KJ7 or similar).