GSM 900 Mobile Jammer -the project report

Design and Implementation GSM Mobile JAMMER Power Supply
JAMMING is the act of intentionally directing electromagnetic energy at a communication system to disrupt or prevent signal transmission.? The GSM Jammer is a device that transmit signal on the same frequency at witch the GSM system operates, the jamming success when the mobile phones in the area where the jammer is located could’nt  make or reciece call phones .