Brings up a concern there are no authenticity check in the mobile networks. Who signs the authenticity of cell towers? This should be like SSL with certificates

Brings up a concern there are no authenticity check in the mobile networks. Who signs the authenticity of cell towers? This should be like SSL with certificates so your phone should only communicate with towers that are certified secure. Hackers have been able todo this for years through GNU radio and FPGA. But this should be a foreign state. And if there are fake towers around the Norwegian parliament. Who, which hackers and what malware is potentially inside the computers of the cell phone operators of Norway? I would target them if I wanted to really listen in to cell phone communication across the country.