A research group at Virginia Tech is claiming that, due to the particular way 4G data is transmitted, an LTE base station can be sabotaged using lightweight equipment that costs as little as $650. Such a thing is possible because, unlike 2G and 3G, LTE depends on control instructions that occupy only a tiny fraction of the total signal -- and details of those specific frequencies have been openly published.
to the research group's director, Jeff Reed, a single malicious
operative with a hot briefcase and a bit of know-how could take down
"miles of LTE signals." If the attacker splashed out on an amplifier,
they could cut off reception for thousands of people across a whole city
Reed stresses that there are no known instances of this
happening yet, but also warns that he can see no "mitigation strategies"
that can "cover it all."