The public answer is the electromagnetic interference, but that has been proved wrong. The real reason is so that you aren't blabbing on your phone or playing loud music/making noise while the pilot is giving out certain instructions.
There are so many! From design of simple electronic wrist watches to supercomputers, cell phones and all sorts of electronic gadgets.
Now it is use in almost each electronic gadgets, like smartphones, laptops,etc.
A rugged cellular device is not hard to do. Try contacting your wireless cellular phone company for advice on buying a rugged cell phone. www.info4cellphones.com is a website that provides information about all cellular phones.
Cellular Blowout is a retail company that specializes in selling discounted cell phones, accessories, and related electronic devices. They may offer sales on older models, refurbished items, or overstock items at reduced prices.
Retailers like Target, Best Buy, Walmart, and Sears sell no contract cellular phones. They offer phones that are pay as you go. They are available for purchase in the electronic department in these retail stores.
E-waste refers to discarded electronic and electrical devices. Examples of e-waste include Computer Monitors, laptops, radios, cellular phones, toasters, microwaves....any type of electronic or electrical household or business item.
the first country to introduce cellular phones was japan
Chain stores such as Walmart offer a wide variety of cell phones including HP cell phones. One can also go to most any local electronic supply store and find the appropriate cellular phones.
Mobile Phones, Ipods and Computers
Many companies are offering prepaid phones today. Prepaid phones are cellular phones that one does not have to carry a contract with. With these phones one will prepay for cellular service. This means one will pay for the cellular service before you use it.
There are basically two type of electronic devices: Active devices - these devices are able to amplify or process the signal like diode fet and BJT. Passive devices- those are not capable of amplifying the signal; these devices are resistance inductance, etc.
CAR PHONES