The reason why Apple's 5g baseband chip failed was exposed.

Apple's iPhone 15 will be the first iPhone to use Apple's own 5G baseband chip, but analysts recently said that this is not the case because Apple is facing "research and development failure". Apple has been using Qualcomm modulation chip to provide wireless chip for mobile data connection for many years. When the iPhone 12 was launched in 2020, Apple once again relied on Qualcomm chips to provide new 5G functions. However, the relationship between Apple and Qualcomm has been worrying. In particular, Qualcomm, on the one hand, sells chips to Apple, and on the other hand, demands that Apple pay the technology royalties for the same chips, which makes Apple feel uneasy. Qualcomm accused Apple of extortion. The CEOs of the two companies held a hostile meeting. Qualcomm refused to sell Apple chips to iPhoneXS and XR. Both companies shelved earlier settlement negotiations and have been fighting. So an experiment costing billions of dollars began. Baseband chip is a signal exchange chip between mobile phone and base station. On the one hand, the signal transmitted by the mobile phone is converted into electromagnetic waves, and then transmitted to the base station through the RF front-end and antenna; On the other hand, the signal is transmitted to the mobile phone through the antenna and RF front end. The baseband chip that can read signals can be said to be a signal translator. Because 2G3G4G5G has many standards, and different operators around the world use different frequencies to transmit data, there are thousands of combinations of various frequencies. In order to translate thousands of signals, it takes time to test and verify the 5G baseband chip. In addition, there are so many different communication devices in the world, and there are some differences between each device, so compatibility testing is needed. At present, Qualcomm, Huawei, ZTE and other manufacturers have applied for a large number of communication patents, and Apple cannot circumvent these patents when developing its own baseband. So baseband chip is not only a technical problem, but also needs a lot of experiments, accumulation, patents and so on. It is unlikely that Apple will produce a 5G chip with performance comparable to that of Qualcomm in a short time.