A cell phone blocker is a device that blocks reception between a cell tower and a cell phone. The devices were developed for the military and law enforcement, initially in response to threats such as explosives and hostage-taking triggered by cell phones.
cell phone jammer, known as cellular jammers, signal blockers, GPS jammers, or text blockers, maintain radio frequencies in a given area, creating a kind of signal flow interference that blocks all communication. Just like the radio silence bubble, users cannot send or receive any calls or text messages when they are within range of a cell phone signal blocker.
If the prospect of a cell phone signal blocker makes your imagination turn to the secret machinations of a scheming Bond villain in his lair, you're not alone. That's why - you guessed it - it's illegal to sell, advertise, distribute, or operate cell phone signal blockers in the United States and most of the world, with very few exceptions.
Because mobile signal jammers intentionally interfere with "authorized radio communications," the FCC found that cellular and WiFi signal jammers "pose a serious risk to communications critical to public safety and can prevent you and others from making 9-1-1 and other emergency calls." [and] also interfere with law enforcement communications."
In addition to public safety concerns, radio frequencies are legally protected by the Communications Act of 1934, which prohibits interference with licensed radio broadcasts.
Proponents of such technology argue that signal jammers are needed in many places where humans simply can't seem to follow widely accepted rules of proper cellphone etiquette. Think about schools, theaters, cars, or other quiet trains... Almost any place where conversation, texting, streaming, etc. can be considered disruptive or even dangerous.
Keep in mind that mobile signal blockers not only block voice and text on your phone, but also interfere with GPS, WiFi, and perhaps most problematic of all - police radar. That's why, as mentioned above, the federal government has banned the sale, promotion, and use of cell phone signal blockers in the United States. So if you're considering a shiny new signal blocker for a little peace and quiet, you may have to settle for earplugs.
Unfortunately, yes, mobile signal jammers can interfere with your cell phone signal booster. A signal booster works by amplifying an existing signal, but if that cellular signal is blocked, a signal jammer will cause interference, no matter how strong the signal is.
While cell phone signal boosters are a good tool for boosting reception when on the road or building materials get in the way, they are still not an effective defense against cell phone signal jammers. For now, any signal jammer is also a signal amplifier jammer.
You guessed it, the most common cell phone jammer interference problem is power failure. Although there are some applications that claim to detect signal jammers, they are unproven and require a valid signal to work. Without the most advanced military technology, it would be nearly impossible for the average consumer to detect cell phone jammers with certainty.
Unless you can physically locate the jammer itself (which usually looks like a walkie-talkie, cell phone, or wireless router) and turn it off, blocking a signal jammer is not your best option. Doable.
If you're tech-savvy enough to change the frequency on your phone, you might also be able to bypass jammers. But that depends on the complexity of the jammer blocking the signal.
If you think you may be the victim of a cell phone jammer attack, your best bet is to move. Cell phone jammers typically have a broadcast range of no more than 30 square feet, so leaving your current location is usually enough to avoid the jammer's range.
