This paper presents the experimental analysis of the noise generator for cellular jammers to protect information from leaking through the cell phone. The security issues are considered and a jamming device proposes to combat leakage of information over cellular networks. The device blocks mobile communication networks by transmitting the same frequency with a strong radio signal in border areas. Based on the correct radio frequencies, we proposed the structural scheme and complete electrical schematic diagram of our device. The research results show the applicability in the area of information security for organization and military use.