This is very good cell phone jammer. Really impressed with the performance, especially for the price... not that I have anything to compare it to. With the WiFi and Mobile Data settings shut down on my phone, I was unable to receive any calls or texts. When I pulled it out of the lined area in the bag, it was searching for a network. Then, I turned on the Mobile Data and Mobile Hotspot and the phone was still unable to receive any messages and my laptop was unable to detect the Hotspot once I put the phone back in the bag... and the phone is right next to my computer.