How to make mobile phone signal jammer | how to boost mobile signal at home

How to make mobile phone signal jammer,how to boost mobile signal at home,Basic Info Model NO.: CPJP8 Car Charger and Charger Adapter: Battery:Li Battery Name: GSM 3G 4G 5g VHF UHF WiFi Bluetooth Radio Jammers Color: Black Weight: 0.8kg Trademark:...