4G GSM Mobile Cell Phone Network Signal Booster

stay cnnected all the time  through purchasing this signal boster .it brings network to all simcards,airtel,telcom,safariocom.A mobile phone signal repeater provides the ultimate solution in any area where cellular communications can not work well due to lack of signals.  The repeater device features easy installation & operation, build-in indoor antenna and no interference.  It could also improve indoor electromagnetism environments, protract cellular battery life and reduce radiation of cellphones.  A mobile phone repeater is ideal for house, home, office use.our  cell phone signal boosters work with all cellular telephone technologies and networks used in North American USA & Canada, The only exception is that of Push-to-Talk (PTT) networks which is one wireless telecom service platform that is being phased out already. Basically all our signal boosters are GSM signal boosters because they cover 698 MHz to 1755 MHz frequencies and bands that encompass the GSM network being used by several mobile service carriers in Canada and United States. Furthermore, those frequencies also cover other wireless networks