About 5G Network

5g is the fifth generation of wireless communications technologies supporting cellular data networks. Large-scale adoption began in 2019 and today virtually every telecommunication service provider in the developed world is upgrading its infrastructure to offer 5G functionality.
The frequency spectrum of 5G is divided into millimetre waves, mid-band, and low-band. Low-band uses a similar freguency range as the predecssor,4G. 5G millimeter wave is the fastest, with actual speeds often being 1-2 Gbit/s down. Freguencies are above 24 GHz, reaching up to 72GHz, whichis above the extremely high freguency band's lower boundary. The reach is short, so more calls are required. Millimeter waves have difficulty traversing many walls and windows, so indoor coverage is limited.
5G mid-band is the most widely deployed, in over 30 networks. Speeds in a 100MHz wide band are usually 100-400 Mbit/s down. In the lab and occasionally in the field,speeds can go over gigabit pre second. Frequencies deployed are from 2.4 GHz. Sprint and china Mobile are using 2.5 GHz, while others are mostly between 3.3 and 4.2 GHz. Many areas can be covered simply by upgrading existing towers, which lowers the cost. Mid-band networks hvae better reach, bringing the cost to the cost of 4G. 5G low-band offers similar canacity to advanced 4G.
In the united states, T-Mobile and AT&T launched low-band services on the first week of December 2019.T-Mobile CTO Neville Ray warns speeds on their 600MHz 5G may be low as 25 Mbit/s down.AT&T using 850MHz, will also usually deliver less than 100 Mbit/s in 2019. The performance will improve, but cannot be significatly greater than robust 4G in same spectrum.

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