These guys can also use non-3G connections for video calls. You know, they may use Wi-Fi internet connection for their purpose, and there are many applications that can help achieve this. For example, one of them is FaceTime. You can use it to make video calls with iOS-based devices over the Internet. 3G jammers cannot be used with Wi-Fi because their frequencies do not match. 3G uses 2100 MHz and Wi-Fi – 2400 MHz.
Another option is that they use FaceTime with 4G connections. AT&T officially supports FaceTime, the application can use 4G LTE mobile Internet connection to run. Verizon also provides 4G Internet, so it may also be used with their users. 4G LTE uses 720-785 MHz, so 3G jammers will not affect it. In this case, it is best to use a general anti-video call wifi jammer. It will block 3G, 4G and Wi-Fi, so within a distance of 15 meters (about 50 feet), there will definitely not be any video calls around you.
Wi-Fi Smartpen is a very interesting gadget. It can record audio and all notes and immediately send them to your Evernote account, where you can access your data from almost any PC, tablet, or smartphone. If there is currently no Wi-Fi connection available, the data will be stored on the onboard memory chip with a capacity of at least 2 GB.
The next thing you should know about Wi-Fi Smartpen is that it will automatically connect to the Internet via Wi-Fi. If it is a new hotspot and protected by a password, you will be guided through all the processes and be able to enter the password. The Wi-Fi Smartpen will remember it and connect whenever possible. Espionage-may be possible because Wi-Fi networks have well-known security vulnerabilities.