Mobile communications is only wireless for end user. Otherwise the data is carried on fiber optics. Wireless doesn't have the bandwidth or channels to support the massive volume of data that millions of smartphones produce.
I didn't look into it too much, maybe it was an overblown story. They did not say how they provided the backhaul. Is it possible to provide satellite uplink or point to point service at the cost of latency? Not my area of expertise...
What I don't understand in general is the lack of EW assets being deployed.
Obviously Russia doesn't have anything like J-16D or EF-18, but it should have something? Especially if they suspect things like Global Hawk and JSTARS is providing info. All Buk SAMS should have been suppressed long ago (perhaps the advanced recon from western surveillance is allowing them to be more disciplined with radar?)
This is something 100% the PLA would not do. They are already doing this with the flybys Y-8 ELINT/EW/MPA and combat aircraft flying together.
The interesting question is how to suppress SHORADS as well. A number of helos were brought down by Strela. This would be equivalent to the ROCA Avengers
We have seen WZ-19 (mmW equipped) work together with WZ-10 to pass targeting data. Would this be enough to stay at a safe range? Does current gen FLIR have enough range to pickup humans who might be hiding with Stingers?