Apple’s iPhone 12 has fallen into the fatal defect of “signal gate”. Even the most loyal fruit powder has been unbearable. Although in their home, watches, headphones, computers, tablets, and intelligent control are all based on Apple’s homekit, this does not mean that we can tolerate the iPhone 12, which has a serious impact on work and life. < p > < p > LUO Zhaohan, who works as a brand director of an Internet enterprise, is bored these days. He has just spent 7599 yuan on the iPhone 12 purchased on Apple’s official website, and there is no signal at all. He has to restart or restore the network settings several times in a few days to recover the signal. < p > “P >” no signal in at least 10 days. It has seriously affected our work and life. I can’t stand it. ” After thinking about it again and again, although he still has a lot of Apple products in his hand, Luo Zhaohan has to make a helpless decision to return his iPhone 12 while he is still in 14 days of free return. < / P > < p > “as far as I know, although there are not many iphone12 available now, many users have reported signal problems on Apple’s official website. So far, Apple has not responded.” Luo Zhaohan said that he was not optimistic about whether Apple would respond to the iPhone 12 signal issue based on Apple’s consistent tough attitude towards domestic users. < / P > < p > for the past few years, the iPhone has been plagued by “poor signal.”. At that time, Intel baseband technology was considered to be the “culprit” of the iPhone signal problem. To this end, the iPhone 12 uses a more stable and stronger signal high pass baseband to solve this problem. However, according to the feedback from many iPhone 12 users, the problem of “signal gate” has not been solved, and it has even become more and more serious. < p > < p > when there was no signal for the first time after getting the mobile phone, Luo Zhaohan, who was usually busy with work and had a lot of information, initially wondered why the mobile phone had no information? I thought no one was looking for it, but when I saw that everyone was receiving information, I found the problem with my mobile phone. < / P > < p > because of his previous experience with the plug-in version of the iPad, Luo Zhaohan quickly solved the problem by restoring the network settings, “more than 100 wechat messages popped up at a time.” < / P > < p > this is just the beginning of his iPhone 12 with no signal. The screenshots provided by Luo Zhaohan show that in the next few days, in the office, in the subway, in the normal outdoor scenes, his iPhone 12 will suddenly and completely disappear – on November 7 alone, there will be no signal at all three times. < / P > < p > “when there is no signal, you can only restart or restore the network settings According to Luo Zhaohan, his iPhone 12 is dual card and dual standby, and people around him have signals all the time, so it is determined that it is his mobile phone problem. < / P > < p > What’s more, it can’t recover automatically without signal. “So many times there was no signal, only one time it was automatically restored.” This is the most annoying point in Luo Zhaohan’s opinion. Although he used to use iPhone x with poor signal and can tolerate it, it is now completely gone, which is “very fatal and can not be tolerated”. < / P > < p > in fact, he is far more than the only one suffering from the lack of signal on the iPhone 12. In Apple’s official Apple community, a user posted on October 26 that no signal had been found frequently since the iPhone 12 was replaced three days ago. Switching numbers and flight modes are not working. You must shut down and restart to get the signal. < / P > < p > as of November 9, 363 users of the Q & A said they had encountered this problem. Also in Apple’s official community, on October 24, the feedback “Apple 12 no signal” post, so far, more than 833 people said they had encountered the same problem, and the number of feedback is still growing.
make complaints about the tiger’s attack on straight men. Up to now, there are at least more than 20 posts Tucao signals. Among them, tiger puff user “dunk King Aaron Gordon” posted the highest response on October 30. He said that the iPhone 12 just purchased from the physical store was on a business trip to the subway station, and was ready to scan the code to enter the station. The mobile phone signal was full but suddenly there was no network. In any case, it was useless to switch. In the end, it was only good to use other ways of transportation, which almost delayed the train. Another user also posted an order form, saying that his “iPhone 12 basically needs no service every day, so restart the phone to get better.” < / P > < p > in addition, there are also a large number of users’ feedback on the same problems in microblogs, post bars and other communities. From the answer, most of the problems encountered are the same as Luo Zhaohan’s, which can be summarized as follows: < / P > < p > 1. The iPhone 12 without signal appears not only in dual card dual standby machines, but also in China Unicom and other contract machines. However, since the iPhone 12 Pro Max and iPhone 12 Mini will not be officially delivered until November 13, it is not yet possible to determine whether there will be a signal problem. < / P > < p > 2. In many scenarios, the signal is not weak, but there is no signal at all, and it can not be automatically recovered. The problem is more serious than the previous iPhone signal weak problem. When there is no WiFi connection. < / P > < p > 3. Switching the flight mode, switching the main card and sub card, replacing the SIM card, changing the location, and updating the system to 14.2 are not solved. Most of them can only be restored by restarting the mobile phone or restoring the network settings. < / P > < p > up to now, Apple’s official customer service and exclusive stores have not given the cause of hardware or firmware problems, nor given specific solutions, and whether the problem was ultimately fed back to the U.S. headquarters is still unknown. < / P > < p > “the solution given to me by customer service is to change SIM cards of both China Mobile and China Unicom, but some have been changed on the Internet, and the problem has not been solved.” What makes Luo Zhaohan feel strange is that sometimes it seems that the primary card has zero grid signal and the secondary card is full, but when switching to the secondary card, there is actually no signal. < / P > < p > in the view of a senior science and technology reviewer, in today’s highly mature smart phones, few models will overturn on the basic skill of signal. “Only apple, for many years, seems to have become a common problem of generations of iPhones, but it has never been solved. It also makes people doubt the technical strength of apple.” From a technical point of view, the mobile phone signal is a complex issue, involving baseband chips, antenna design, radio frequency components and other links. Previously, there are two main guesses about the reason for the poor signal of iPhone: 1. Intel baseband network performance and algorithm are not good. 2. IPhone antenna design is defective. < / P > < p > however, neither apple official nor Intel official has ever explained, and even between the evaluation media and analysts, it is difficult to reach an agreement. In 2018, Dr. Wu Xingfeng, a communication expert who once worked in radio and television systems and Huawei, and zealer, a reviewer, founded the iPhone XS signal doors split each other, once in court. < p > < p > Apple has been carrying Intel 4G baseband in specific areas since iPhone 7 in 2016, breaking the situation that Qualcomm was the exclusive supplier of iPhone baseband chips. “Qualcomm Intel baseband mix” status continues until the iPhone 8 and iPhone X Series in 2017. < / P > < p > by 2018, all three iPhones released this year used Intel 4G baseband due to the patent dispute between apple and Qualcomm. It is precisely in these years that a large number of users make complaints about iPhone signals. < / P > < p > about baseband chips, some people in the industry have explained this: as the lifeblood of smart phones, baseband chips determine the strength of mobile phone signals and the speed of accessing the Internet. In short, whether your mobile phone can be connected to the Internet and whether the data upload and download speed is fast or not is directly related to it. < / P > < p > on April 17, this year, Qualcomm and apple simultaneously announced on their official websites that they had reached a settlement agreement. The contents of the settlement include the rejection of all lawsuits between the two companies in the world, Apple will pay a license fee to Qualcomm, and both parties have reached a direct license agreement for a period of six years. < / P > < p > this gives the outside world hope for better iPhone signals. Luo Zhaohan said that he started the iPhone 12 for the first time this year, just for its publicity, and the network problems will get better after changing the high pass baseband. < / P > < p > however, at least according to the current feedback from iPhone 12 users, Intel can’t afford to back the signal problem, and even it’s difficult for Qualcomm to back the signal problem. After all, Android flagship, which also uses Qualcomm baseband, does not have poor signal. < p > < p > industry insiders point out that antenna design is the top priority of mobile phones, which will affect the number of frequency bands the mobile phone can support and the maximum uplink / downlink rate that can be achieved. However, the antenna design has always been Apple’s weakness. As early as the iPhone 4, engineers placed the antenna location on the metal frame inside the front model to improve sensitivity. Finally, the so-called “changing everything” iPhone 4 was exploded with the most basic communication defect – “antenna gate”. < / P > < p > on April 7, this year, some iPhone XR users in California filed a class action lawsuit against apple. The users of the class action believed that Apple deliberately concealed the information about the defective antenna used by the iPhone XR and benefited from it. The so-called “defective antenna” means that the LTE antenna of iPhone XR only supports 2×2 MIMO, while the iPhone XS / XS max of the same period supports 4×4 MIMO. The stiff technical vocabulary can be simply summed up as: these users blame the use of “poor quality” 2×2 antenna for the problems of iPhone XR call disconnection, slow network speed and poor signal. In addition, Apple’s well-known analyst Guo Mingzhen once said in a report that in order to solve the signal problem, the iPhone se 2 released in the first half of 2020 adopted LCP antenna. It can improve the efficiency of signal transmission, thus greatly improving signal performance. However, from the feedback of users since then, the iPhone se 2 with low shipment volume has not completely solved the signal problem. As Apple’s first 5g mobile phone, iPhone 12 supports not only dual-mode 5g networking, but also sub-6 and 5g millimeter wave bands. According to a report by foreign media in February this year, because the QTM 5255g millimeter wave antenna module of Qualcomm does not meet the requirements of apple, Apple may design its own antenna for iPhone 12. < / P > < p > some observers in the mobile phone circle said that in theory, the number of antennas will increase with the increase of mobile phone frequency band. Therefore, the number of 5g mobile phone antennas should be at least a dozen. Huawei mate 30, released last year, integrates 21 antennas, including 14 5g antennas. Although the number of iPhone 12 antennas has not been released, it is conservatively estimated that there are more than a dozen. < / P > < p > how to reasonably arrange more than ten antennas in the limited fuselage space, and ensure that the signal strength of each antenna and the signal does not interfere with each other is undoubtedly a technical problem. In addition, the iPhone 12 uses a metal body, which blocks some signals, and the body is thinner, making antenna design more difficult. < p > < p > after the release of the iPhone 12, Hua Hailiang, vice president of Meizu technology, revealed why the “retro” border design was adopted. This is because the antenna height is almost equal to the thickness of the iPhone 12 frame. Moreover, the 5g millimeter wave antenna must fit the edge of the mobile phone, so apple can only choose to make the mobile phone frame right angled when the 5g millimeter wave antenna is normally placed. < / P > < p > although what is the current guide