I need to totally jam an A-GPS system, how can I achieve this? Will my GPS jammer work with it? If it is not, so which one can?
Keep in mind that everything you send via the Internet stays there forever, there are no exceptions. We can not trust the media giants who create the infrastructure, which manages the Internet, they have already proven that they are spying on us. Remember the spy scandal around Huawei, one of the leading network hardware providers. Major hardware vendors are likely collaborating with law enforcement agencies, such as the NSA, and intentionally creating backdoors on their devices. Smartphones and other modern wireless gadgets are the most dangerous here because they collect a lot of information in one place. It is very important to conceal very sensitive information as it can easily be accessed by third parties.
But what can we do about everything that spies on us? We can not stop it or block it altogether, the only thing we can really do is make espionage too expensive for intelligence agencies. First, as Bruce Schneier said, encrypt your communications. If you have your own website, let it run on HTTPS, if you are a software engineer, encrypt all connections with TLS or SSL. The main idea here is to make DPI or, projects like PRISM, and even XKeyscore useless. The police can always follow the criminals, but they will not be able to spy on everyone.
It just downloads the info on your coordinates from three closest cell towers so it reaches your coordinates a little bit faster. It works with cell tower triangulation technique I have recently written about.
So, the A-GPS compatible device uses two different frequency bands, one for GPS navigation – 1227.6-1575.42 MHz and the GSM 850/1900 MHz for cell phone towers triangulation. In order to jam the device’s transmissions totally you will have to use a GSM/GPS jammer.
You should pay attention to that that in that case all cell phones in the area will be totally GPS jammer too, and your old GPS jammer will work with that device just partially. It will jam the GPS interactions so you will not be seen on GPS tracking, but you will be still available for tracking with cell phone tower triangulation!