What can happen if you use your cell phone on a plane?
There's a valid reason why you can't use your cell phoine in the air but apparently no one else seems to know it. The reason is that at high altitude your cell phone range is enhanced and the cell phone system on the ground cannot tell which receiver tower you are closest to. So it takes up to a dozen or so relay stations to deal with your one call, hence you are using cell resources voraciously. This doesn't take place on the ground, just when you're in the air. The built-in airphone on the plane is different and just links to one station via a radio channel, but your cell phone will link to a dozen or more base relays. The ground cell system wasn't designed with airborn traffic in mind, the antennae are directed at a downwards angle to cover the earth: you can see this aspect for yourself when you look up at a cell tower. That's why you're not allowed to use the phone in the air, it will work (that doomed flight on 9/11 clearly showed that) but its a strain on the cell phone infrastructure. Its all related to the way the cell phone system was designed. Everything isn't a conspiracy!
Is anyone else having issues with straight talk prepaid cell phone service?
I just purchased a straight talk phone and unlimited air time card on May 2 2010 and I am having many issues. I cannot reach anyone on customer service only busy signals and all circuits are busy now recordings. My phone reading insufficent funds and will not allow me to do anything. If anyone else is having issues please share. Thanks
Why can't we use cell phones on airplanes?
They have the POTENTIAL to interfere with navigation/communication systems as they operate on a close frequency/wavelength. That is why there are regulations on their use. A pilot I flew with told me once he heard a woman in back talking to a friend over his headset! In fact, the womans name was used in the conversation and he had to ask "Barbara" to please discontinue use of her phone for departure over the PA. Phones transmitting near the 1700 Mhz range were found to have caused these incident on aircraft: · Slaved Compass froze or overshot actual magnetic bearing · Needles on instruments (engine/aircraft & nav) appeared unstable · Digital VOR bearing display showed errors of 5 degrees · VOR to/From indicator reading was reversed . VOR & ILS course indicator errors with & without a failure flag · Sensitivity of the localizer was reduced · Background noise in the audio system · False warnings of unsafe conditions such as smoke alarms in the baggage compartments Here are some interesting links on the subject- Effects of cellular phones on aircraft avionic equipment": http://www.caa.co.uk/docs/33/capap2003_0... http://www.cs.ccsu.edu/~pelletie/local/n...
Jalalabahd (spelling?) Air Base (nothing that goes against OPSEC!)?
I was just wondering if anyone knew anything about Jalalabahd? How living conditions are there for the service members and communication? Do they have access to computers and phones on a daily basis or what? If so, is there WiFi all over or just in one specific spot? I'm pretty sure this question doesn't violate OPSEC, but if it does, feel free to tell me! I'll delete it right away. I'm new, so I'm still a little ignorant to the full spectrum.
What is the work of flight mode in mobile phones? How does the phone connect to wi-fi even when the phone is on flight mode?
“Flight mode” means be able to use a phone on a commercial airplane which, until recently, had no wifi onboard. So airplane mode turns off anything that might interfere with the plane’s navigation system, including wifi. (You wouldn't want the plane to suddenly think that the ground under you was “straight” and it was flying “up” would you?) Now that planes are tested for wifi susceptibility, and only those not susceptible to interference at 2.4GHz or 5GHz (and all the subharmonics and nose associated with wifi) have wifi onboard. There are still planes (any plane that doesn't have onboard wifi) that haven't been tested (and probably never will be - it’s a tremendously expensive process), so you should keep wifi off on those planes. One touch - airplane mode - does that.Some time in the future, when every new plane will be tested and any problems fixed before it comes off the assembly line (and that's one of the problems - every single plane has to be tested, not just one test for that model), so phones will change and wifi won’t get turned off in airplane mode. (Bluetooth, being on the same band of frequencies as 2.4GHz wifi), probably won't either.So all airplane mode will be doing is turning off the phone (talk, text and mobile data), and that would be due to the fact that from 35,000 feet you're going to be hitting a lot of towers with the same strength, and the cellular system just can't handle that. (One day, there will me a microcell on planes, so you connect to that, and it communicates with the ground by some other means - then “airplane mode” will be named something else - like "”radios on/off” - because using a cellphone at a blasting site (and some other situations) is always going to be dangerous.
Chinese 5th generation fighter jets is going to service in 2015. could F-22 shoot it down.?
After 4 years testing and modifying. This J-20 stealth fighter jet is going to enter volume production stage in 2015. It will carrying Chinese home-made engines How could U.S keep its mastery of the sky ? Thsee jets have more technology than F-22. Because it was designed after F-22. it is designed to take mastery of the sky from F-22. F-22 did very good commercial advertising job but it's real capability still unknown. China's military complex still developing following jets. J-31 ( export version ) J-18. ( red eagle ) J-25. ( GHost bird) 4.5 generation J-10B J-10C J-23 Those aircrafts will going to enter into volume production stage at very shoot time