Tele2 AB

The cellular side is equally interesting.

[lip smacks] Beskrestnov said that Russian Shaheds carry Russian Tele2 SIM cards and connect to cellular networks while flying near a national border.

And according to his account, Ukrainian roaming for those SIM cards has been blocked, but the drones obtain roaming service from a Belarus operator when flying near Belarus, and potentially through Polish or Romanian networks along the frontiers.

That doesn't mean every drone is being flown through cellular system, but it does show that Russia is mixing commercial communication with military drones, and this is a reason that the border regions are so technologically important.