I don't buy it. First: just because you're close to the cell tower doesn't mean you're below it. Directional antennae work really well, it's trivial to shield yourself against jamming from below. Also, note that cruise missiles have inertial backup too. As long as they get a decent GPS fix in the non urban area outside the city where there are no jamming towers, they can still hit their target.

Add that to the "duh, who's interested in bombing Russia?" angle and I agree: 100% propaganda for internal consumption.