Providing tracking information is one purpose of the chips, but an even greater purpose is to receive transmissions and, by transmitting negative frequencies within the body, alter the energetic composition of the person--basically make them fearful, angry, obedient, etc. This is serious black magic. Indeed, this is already being done with very small chips that are being injected via vaccinations, especially of children. This is to "short circuit" the physical bodies that many Star Children are incarnating into at this time, to make it difficult for them to oppose the NWO government. DO NOT accept any vaccinations!
The Sirians related by Patricia Cori (Sirian Revelations series) have a lot on frequency manipulation. It is one purpose of HAARP and a major reason for the downfall of Atlantis, according to them. I've also heard about the microchips in vaccines from David Icke, who apparently talked to a scientist that helped create it.
While the Zetas are pretty quiet about HAARP, the Sirians talk a lot about it. It seems to me that each ET source has something they like to emphasize, and things that they would rather not talk about. The Sirian sources say that the original frequency manipulation techniques of Atlantis were developed by the same extraterrestrial entity that later incarnated as Nikola Tesla, and hint that the Tesla-entity may be back today, shuffling around the antenna fields of Alaska. The Sirians don't like to talk about Nibiru, however, and insist that it is at the other end of its orbit, far far away. (Liar liar pants on fire! Pretty cheesy for a bunch of immortal energy beings from sixth density, but I suppose if they didn't have their faults they would be at seventh density.)
A proper attitude will help dispel the effects of such vibratory manipulation, along with shutting off the TV and radio. There are positive vibratory techniques as well, such as the Tibetan tone bowls.