January 28 news, netizens @huijiajun014 broke the news, iOS 15.4 beta version update, he found that the modem and IPCC version are updated, the modem updated to 1.55.00, IPCC updated to 49.6.5, the system added 5G 700MHz N28 band support.
The N28 band (SA) is the frequency band allocated by the Ministry of Industry and Information Technology to China Radio and Television, due to the thin foundation of China Radio and Television in terms of operators, China Radio and Television adopts the scheme of jointly building base stations with China Radio and Television, and both sides enjoy this frequency band at the same time. The transmission scheme of the low-frequency 5G band is wider, and radio and television only need one-tenth of the base station of friendly merchants to cover the whole country.
Radio, Television and Mobile have adopted a one-time plan to build 480,000 base stations, and it is expected that all of them will be completed by the end of this year, which will become the most extensive 5G infrastructure network in the mainland. When the iPhone supports this band, mobile users will benefit greatly, even in rural areas of some cities, they can receive fast 5G signals.
After @huijiajun014 measurements, the N28 band signal is full and the measured rate is very fast.
China Radio and Television's 5G network has been tested on December 6, 2021, and can basically be commercialized. Radio and television's 5G advertisements have appeared on the streets of Urumqi, and it may be launched in the next year. By signing the base station co-construction and sharing agreement, China Radio and Television leased 2G/3G/4G base stations and some 5G base stations from China Mobile, ensuring the coverage of basic communication services.
At the beginning of the launch, there may be preferential promotions, and if the price is right, the small partners may also buy a card to feel the low-frequency 5G band with wide coverage. At present, there are not so many users using this frequency band, and the network speed should be quite fast.
If the user is a user of China Unicom or Telecom, there is no need to be too anxious. In November 2021, the Ministry of Industry and Information Technology issued implementation opinions to promote 5G off-network roaming, and the four major operators may share 5G base stations in the future. In this way, users of other operators can also use this excellent N28 band, but it is difficult to say how long it will take. Xiao Lei would like to remind that at this stage, when buying a 5G mobile phone, it is best to see whether it supports the N28 band.