Keep in mind that we got through thousands of years, without a cell phone (I don't have one).
Spies use signals like the color of the curtains in a window, a chalk mark on a fence, door or even a statue.
How about keep an eye on me, yellow shirt, means tomorrow, green one is as planned, we go as per the plan.
"Hawking" (in arabic hawk and eagle are the same word)
http://www.legalaffairs.org/issues/July-August-2003/feature_koerner_julaug03.html Your Cellphone is a Homing Device
Don't want the government to know where you are? Throw away your cell, stop taking the subway, and pay the toll in cash.
By Brendan I. Koerner
IF YOU PURCHASED A NEW CELLPHONE over the past 18 months or so, odds are that one of the features listed in small print on the side of the box was "E911 capable." Or, as in the case of my latest Motorola, "Location technology for piece [sic] of mind." Perhaps you asked the salesman to explain the feature, and he replied that it means that cops can home in on your phone in case of an emergency, a potentially important perk should you ever find your hand pinned beneath an immovable boulder in rural Utah, as Aron Ralston did recently. Assuming he could have gotten a signal, an E911-capable phone might have saved the young backpacker the pain of having to amputate his own arm.
What your salesman probably failed to tell you—and may not even realize—is that an E911-capable phone can give your wireless carrier continual updates on your location. The phone is embedded with a Global Positioning System chip, which can calculate your coordinates to within a few yards by receiving signals from satellites. GPS technology gave U.S. military commanders a vital edge during Gulf War II, and sailors and pilots depend on it as well. In the E911-capable phone, the GPS chip does not wait until it senses danger, springing to life when catastrophe strikes; it's switched on whenever your handset is powered up and is always ready to transmit your location data back to a wireless carrier's computers. Verizon or T-Mobile can figure out which manicurist you visit just as easily as they can pinpoint a stranded motorist on Highway 59.
(snip)
THE WIRELESS INDUSTRY HAS A NAME FOR SUCH CUSTOM-TAILORED HAWKING: "location-based services," or LBS. The idea is that GPS chips can be used to locate friends, find the nearest pizzeria, or ensure that Junior is really at the library rather than a keg party. One estimate expects LBS to be a $15 billion market by 2007, a much-needed boost for the flagging telecom sector.
(snip)
Next point:
http://www.worldsearch.com/electronics/hacking/ (note the URL NAME = hacking)
Hawking Technology H-A16SIP Hi-Gain 6dB Omnidirectional Wireless Antenna
http://www.net-security.org/news.php?id=1521 Wireless hacking threat grows
Posted by Mirko Zorz - LogError
Tuesday, 26 November 2002, 2:29 PM CET
The growing popularity of wireless technology is opening corporate networks to hackers as administrators face a trade-off between security and demand for easy access.
Companies are rolling out wireless networks because they are cheaper and more flexible than cable, but the nature of wireless and lack of strong encryption technologies means they are vulnerable to attack.
While warchalking - marking of pavements to indicate a wireless access point, or hotspot - was not yet common here, two types of people were taking note, VeriSign enterprise consultant Richard Miller said.
Some were looking for free wireless access to the internet. But others were seeking useful information on corporate networks they entered.
Pressure to provide wide-ranging access to users meant some wireless networks were operating in default mode - either deliberately or inadvertently.