City Pedia Web Search

Search results

1. Results From The WOW.Com Content Network

2. Cordless telephone - Wikipedia

   en.wikipedia.org/wiki/Cordless_telephone

   A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same building or within some short distance from the base station. A cordless telephone differs functionally from a mobile telephone in ...

3. Mobile phone - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone

   A mobile phone or cell phone[ a] is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone ( landline phone ). The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which ...

4. History of mobile phones - Wikipedia

   en.wikipedia.org/wiki/History_of_mobile_phones

   Consumer demand was strong despite the battery life, weight, and low talk time, and waiting lists were in the thousands. [44] [45] Many of the iconic early commercial cell phones such as the Motorola DynaTAC Analog AMPS were eventually superseded by Digital AMPS (D-AMPS) in 1990, and AMPS service was shut down by most North American carriers by ...

5. Cellular frequencies in the United States - Wikipedia

   en.wikipedia.org/wiki/Cellular_frequencies_in...

   There are 51 MTAs, 493 BTAs and 175 EAs in the United States. The Advanced Wireless Services (AWS) bands, auctioned in the summer of 2006, were for 1,710–1,755 MHz, and 2,110–2,155 MHz. The spectrum was divided into blocks: A blocks were for Cellular Market Areas, based on existing cellular (1G) licenses, and were 2 × 10 MHz.

6. Wireless device radiation and health - Wikipedia

   en.wikipedia.org/wiki/Wireless_device_radiation...

   The HPA also says that due to the mobile phone's adaptive power ability, a DECT cordless phone's radiation could actually exceed the radiation of a mobile phone. The HPA explains that while the DECT cordless phone's radiation has an average output power of 10 mW, it is actually in the form of 100 bursts per second of 250 mW, a strength comparable to some mobile phones.

7. Martin Cooper (inventor) - Wikipedia

   en.wikipedia.org/wiki/Martin_Cooper_(inventor)

   Martin Cooper (born December 26, 1928) is an American engineer. He is a pioneer in the wireless communications industry, especially in radio spectrum management, with eleven patents in the field. [ 2][ 3] On April 3, 1973, he placed the first public call from a handheld portable cell phone while working at Motorola, from a Manhattan sidewalk to ...

8. The 6 best cellphones for seniors in 2024 - AOL

   www.aol.com/lifestyle/best-cellphone-seniors...

   Consumer Cellular Verve Snap. Best flip phone for seniors. $59 at Consumer Cellular. SAMSUNG Galaxy A23 5G A Series Cell Phone, Factory Unlocked Android Smartphone, 64GB, Wide Lens Camera, 6.6 ...

9. Smartphone - Wikipedia

   en.wikipedia.org/wiki/Smartphone

   A smartphone, often simply called a phone, is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities. It typically has a touchscreen interface, allowing users to access a wide range of applications and services, such as web browsing, email, and social media, as well as multimedia ...