This paper was designed for the advanced mobile phone signal jammer. Mobile jammer is a device that is used to prevent mobile phones from transmitting or receiving signals from the base stations. The mobile phone signal jammer works based upon the principle of radio wave frequency (RF). Here we have jamming techniques, section, keys, microcontroller and GSM unit. The information will propel to the microcontroller, then the regulator will propel the data to GSM and GSM will drive message to the clients whose figures are programmed in GSM and communique will be blocked. After sending the message, mobile jammer circuit will activate and signals are jammed or blocked. We can use network passwords and Ids in some authenticated mobile phones in schools and colleges. The 4G mobile phones can be blocked by using the advanced jamming devices. We can use the jammer in long distance by extending the network strength.