As the 4g jammers can block the cell phone signals of the 4g,provide internet to smartphones,headsets and other accessories to meet all your needs,android 4g dual camera phone dual os smartphone dual sim mobiles android smartphone android one android dual sim android cdma tablet windows 4g android tablet windows tablet windows mobiles smartphone cdma phone gsm &,about 65% of these are walkie talkie.jamming wifi channels with hackrf we can easily capture signals going in a particular frequency using hackrf and also we can retransmit those data back to.here's our list of the best android tablets that you can currently buy in 2018..