At present it appears the Russians are limited to voice communications, for the most part. Meanwhile the local Ukrainians who are resisting them have a distinct advantage in terms of sheer bandwidth. They can share video and pictures of things the Russians do, and how to deal with them to a wide audience for almost no cost.

When the Russians tried disguising their fuel trucks, even though it looked like they did a fairly good job, someone figured out how to spot this, and passed it on, so everyone knew in short order.

Knowledge is power, Network effects multiply that power.