At its latest launch of the first 5g iPhone, apple said it had tested it on more than 100 networks. It’s a huge success, because 5g networks operate on a wide spectrum. In order for all four iPhone 12 models to support 5g, Apple had to use additional chips, RF filters and multiple antennas. < / P > < p > so far, the road to 5g has not been as impressive as it has been advertised so far, it is not much faster than 4G, and the coverage is quite different, which is largely due to the technology being too fragmented. Swarun Kumar, an assistant professor at Carnegie Mellon University and head of the emerging wireless technology laboratory, said 5g is “a zoo of different technologies” and “despite the same standards, it can be interpreted in different ways.” < / P > < p > when Apple launched its new mobile phone, it tried its best to sell people the potential of 5g, showing how it could make smartphones more like game consoles by offloading computing functions. But the reality is that the wireless technology is still in its infancy. Ian Fogg, vice president of analysis at opensignal, a UK company that tracks wireless network performance, said 5g support for Apple’s four new iPhones was “really unusual.”. Previously, only larger Android devices tended to support 5g speeds, he noted. < / P > < p > given the hype surrounding 5g, the technology may be doomed to disappoint at first. The standard promises data transmission speed up to 10Gbps per second, 100 times faster than 4G speed, with a delay of 1ms, far lower than 50ms of 4G. It also allows more devices to connect to the network at the same time. < / P > < p > just as 4G has spawned a new generation of smart phone applications that drive economic growth, developers are expected to build new services on the basis of 5g. In addition to giving mobile phone super capability, the technology can eventually connect the automatic driving vehicle, industrial machinery, medical equipment and intelligent toaster to the cloud. However, so far, 5g has not achieved the effect of speculation. < / P > < p > 5g wireless standard aims to maximize the use of different bands of the wireless spectrum. The standard covers multiple frequency bands, but mainly the low frequency band and intermediate frequency band below 6 GHz, and the ultra wideband or millimeter wave band above 24 GHz. Generally speaking, the lower frequency band provides a larger range but lower speed, while the higher frequency band provides ultra-high speed, but only covers a range of several hundred meters, so it is very vulnerable to interference. To make the most of 5g means mixing all these frequencies together. < / P > < p > so far, only part of the 5g band has been provided by ISPs in the United States. T-Mobile and at & t focus on low and intermediate frequencies, providing greater coverage, but only slightly faster than 4G. Verizon mainly provides ultra wideband 5g, providing download speed of nearly 1Gbps, but only in very small downtown areas. Overall, the United States lags behind many other countries in terms of average data transmission speeds of 4G and 5g, according to a report released by opensignal in October. At Apple’s latest launch, Verizon chief executive Hans vestberg said the company would launch 5g networks across the United States. The network will run in the low frequency band, which means there won’t be such an impressive speed boost, but it will cover a wider range. The company also said it would involve technology for 4G and 5g users to share the same spectrum. < / P > < p > in the United States, the situation is more complex, because only a limited number of intermediate frequency bands are available, while the medium band can well balance speed and coverage. But that will change in the next few years. The U.S. government recently auctioned off more intermediate frequency bands and announced that it would make more of them available through another auction. Kumar said it was not clear whether one spectrum range would be more dominant than the others, but he expected the combination of intermediate frequency and millimeter wave technology to win. < / P > < p > so far, many 5g mobile phones launched only support 5g of a certain frequency band. For example, products sold in Europe generally do not support ultra wideband because it is less common there. In general, users need to pay more for supporting different versions of 5g phones, such as Verizon’s Samsung S20. “Phones are everywhere, every manufacturer has a different definition of 5g, and the standard is very low,” Kumar said < / P > < p > all four iPhone 12 models released by apple are designed to use a range of frequency bands, including most of the low, medium and high frequency bands used by 5g worldwide. This means that these devices should be able to run on multiple carriers’ networks and roam between 5g networks. Some people think that the iPhone 12 could be an important moment for 5g, helping to push more people to try it out and pushing the network to roll out more capacity. Jason Leigh, an analyst at IDC, a market research firm that tracks the 5g industry, said: “it simplifies the buying process, and with the advent of new bands, it is hoped to demonstrate to some extent the future value of this device so that customers don’t need to consider which bands their preferred operators use.” But Lee said a key issue with 5g is how it affects battery life. Apple said it had developed several technologies to minimize battery power consumption, including a technology called “smart data mode,” which allows applications to use 5g networks only when they really need them. However, some experts are still skeptical. Kumar said he will wait to see which network provider can provide the most compelling speed and greater coverage. “Well, if I upgrade my phone now, 5g won’t be the most important factor in deciding,” he concluded Privacy Policy