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Rugged smartphone. A rugged smartphone is a specific type of toughened smartphone which is designed to be completely sealed within a durable housing to protect it against damage from water, shock, dust, and vibration. [1] [2] [3] Rugged smartphones are designed to survive extreme weather and temperatures, accidental damage, and rough handling ...
MIL-STD-810G certified. Water proof up to 5 m for 60 min. The Cat S60 is a mobile phone introduced in 2016 by Caterpillar Inc. within the Cat phones line and has since been succeeded by the Cat S61 and Cat S62 Pro. It is the first smartphone to include an integrated thermal imaging camera and presently [when?] the world's most waterproof ...
A cell site, cell phone tower, cell base tower, or cellular base station is a cellular -enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network. The raised structure typically supports ...
The following is a list of products manufactured under the Sony Ericsson brand.Most of the models have been released under multiple names, depending on region of release, currently usually indicated by a letter added to the end of the model number ('i' for international, 'a' for North America, and 'c' for mainland China), but indicated on some (mostly older) models by a slightly differing ...
TracFone Wireless, Inc. (TFWI) is an American prepay wireless service provider wholly owned by Verizon.It operates as a mobile virtual network operator offering prepaid and no-contract service on the Verizon, AT&T Mobility, and T-Mobile US networks [2] under multiple brands that include Tracfone, Page Plus Cellular, SafeLink Wireless, SIMPLE Mobile, Total Wireless, and Straight Talk Wireless ...
GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM . Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.
AT&T Mobility, LLC, also known as AT&T Wireless and marketed as simply AT&T, is an American telecommunications company. It is a wholly owned subsidiary of AT&T Inc. and provides wireless services in the United States. AT&T Mobility is the second largest wireless carrier in the United States, with 114.5 million subscribers as of March 31, 2024.
AT&T Inc.is an American multinational telecommunicationsholding company headquartered at Whitacre Towerin Downtown Dallas, Texas.[4] It is the world's third-largest telecommunications company by revenueand the second-largest wireless carrier in the United Statesbehind Verizonbut ahead of T-Mobile.[5] As of 2023, AT&T was ranked 13th on the ...