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  2. PowerSource (phone brand) - Wikipedia

    en.wikipedia.org/wiki/PowerSource_(phone_brand)

    Originally called "hybrids," these devices were aggressively marketed to Nextel customers in so-called "red markets" (areas of high Nextel network congestion) beginning in the fourth quarter of 2006. Operation. PowerSource phones used the Sprint network for interconnect (regular voice phone calls) and the Nextel network for walkie-talkie calls.

  3. Nextel - Wikipedia

    en.wikipedia.org/wiki/NEXTEL

    Nextel's iDEN network offered a then unique push-to-talk "walkie-talkie" feature in addition to direct-dialed voice calls. Nextel was one of the first providers in the United States to offer a national digital cellular coverage footprint. Prior to merging with Sprint Corporation in 2005, Nextel Communications, Inc. was a publicly traded company.

  4. Sprint Corporation - Wikipedia

    en.wikipedia.org/wiki/Sprint_Corporation

    Sprint Corporation. Sprint Corporation was an American telecommunications company. Before being acquired by T-Mobile US on April 1, 2020, it was the fourth-largest mobile network operator in the United States, serving 54.3 million customers as of June 30, 2019. [3]

  5. Motorola i860 - Wikipedia

    en.wikipedia.org/wiki/Motorola_i860

    Motorola i860. A Motorola i860 Originally Released In 2005. The Motorola i860 was the first iDEN phone to feature a camera. The VGA camera was equipped with a 10-second video record option and built-in ultra-bright spotlight. As it was the first iDEN phone to feature a camera, it was also first to feature multimedia messaging as well as push-to ...

  6. Motorola i920/i930 - Wikipedia

    en.wikipedia.org/wiki/Motorola_i920/i930

    In the past, world travellers subscribing to Nextel iDEN Services generally have to carry an alternate phone (i.e. the V180) to roam around the world. With the i920 or the i930, one phone, one phone number can be used at any part of the world which has a GSM network. The phone won't be made available to either Boost Mobile or Southern Linc ...

  7. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, in contrast to a broadcast receiver, which ...

  8. ReadyLink - Wikipedia

    en.wikipedia.org/wiki/ReadyLink

    ReadyLink was a " walkie-talkie " service, which used Session Initiation Protocol (SIP), offered by the Sprint Nextel Corporation, in an effort to compete with then-separate Nextel Communications. It was necessary to have a Sanyo or a Samsung ReadyLink capable phone and a matching service-plan in order to use this feature.

  9. Mobile radio telephone - Wikipedia

    en.wikipedia.org/wiki/Mobile_radio_telephone

    t. e. A mobile radio telephone. Mobile radio telephone systems were mobile telephony systems that preceded modern cellular network technology. Since they were the predecessors of the first generation of cellular telephones, these systems are sometimes retroactively referred to as pre-cellular (or sometimes zero generation, that is, 0G) systems.

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