From the Scan-DC mailing list:
https://rusi.org/explore-our-research/publications/commentary/russian-comms-ukraine-world-hertzI have seen Reddit postings of supposed sound bites of Russian troops calling home where they talk of looting and murders. If Ukraine is the source of those postings, then they must be actively mining the cellular network. If the Russians are using cellphones for Command and Control like the URL article suggests, then the Ukrainians are reading this too.