Some low-power jamming devices block only the downlink signal from the cell tower to the phone while others also block the uplink signal from the phone to the tower.

They are called a mobile phone jammer because they block signals on mobile phones.

The mobile phone signal jammer only shields the signals of mobile phone networks. The frequency used by mobile phones is also called a GSM / CDMA / DCS / PHS signal, which can be blocked by this device. This is why they are called a mobile phone jammer because they block signals on mobile phones

A student could be on their phone and not paying attention, so they don't study as hard or take notes as well. Then they get a bad grade, which affects their future job prospects and other opportunities!

Or if someone is sitting next to someone who has a phone out (and isn't supposed to), then they won't be able to concentrate either—and that could lead them down the road towards failure too!  The moral of the story? Keep your devices switched off until after you've finished taking the test so everyone else can do better too!

Jamming devices work by transmitting a signal on the same frequencies as the phone network

Mobile phone signal jammers work by transmitting a signal on the same frequencies as the phone network. This makes it difficult for mobile phones to connect with their signal towers and renders them useless.

One of the most common applications for signal jammers is in prisons. Not only do they provide a way to prevent inmates from using cell phones to coordinate escapes and other crimes, but they also prevent them from receiving calls that could be used to send them messages from other prisoners or their families.

Signal blocker device can also be used by companies and organizations as a way to prevent employees from accessing unapproved sites on their computers during work hours. This keeps productivity high and reduces liability for any inappropriate content that might appear on employee screens.

The device emits a very low power signal which disrupts the communication between the phone and base station

This is not harmful to people, but it can be detected by mobile phones and cause them to stop working.

The device is placed adjacent to the area you wish to protect from mobile phone use

The effective shielding area is based on the strength of the signal from the mobile phone network. If it cannot receive any signals, then it cannot send any signals. In order to get a better understanding of how powerful this device is, we will take a look at some more information below:

The device is placed adjacent to the area you wish to protect from mobile phone use. For example, if you want to protect an entire room or office space from being able to make or receive calls, then place the device in that general area and turn it on. You can also use it in other places such as airports or hospitals where people need their cell phones turned off for their own safety because they are too close together and there are too many other distractions going on around them while they're trying focus on work tasks like checking emails etc...

If someone needs help blocking out all signals coming through when they're trying focus on something important like studying for exams then this will definitely assist them with being able to do so without having any problems!

Mobile phone jammers are commonly used in movie theaters, churches and libraries, where cell phones must be silenced.

This type of jamming device is also used to prevent cheating during exams or examinations. It helps to prevent cheating by preventing students from using their mobile phones during tests or exams. This allows students to focus on their studies without the distraction of a buzzing sound coming from someone else's phone signal nearby them.

The mobile phone jammer is used in many places where cell phones are forbidden. It can be used for cheating on exams, or it can also be used for private occasions.