A jammer is a type of device that transmits the same quality radio frequency signal used on a mobile phone, disrupting communication between the phone and the cell-phone station. If there is a mobile phone within the limits of the jammer, the communication activities of that mobile phone become inactive, as it prevents receiving and transmitting signals.
Currently using mobile phone jammer is not legal in Bangladesh. Mobile phone network jammers were used in Bangladesh especially in quiet places like hospitals, mosques. So BTRC has requested to remove this mobile phone jammer.