HT-M02 reinstall, 4G files missing

I had to reinstall Debian 10 to HT-M02. Now there are no files needed for 4G (Quectel EG25) and they cannot be downloaded because of Debian 10 end of life. There is in Heltec’s downloads file heltec-M02-4G-debian-v2.img, that seems promising, but I do not know is that right one and how to use it. Can anyone give a hint?