However, after the fourth round of sanctions, Huawei required all supply chain enterprises involved in American technology not to provide parts and components to Huawei's 5G communication equipment, including 5G RF chip combination and 5G baseband. It can be said that the US sanctions against Huawei's mobile phone business have formed a complete system.
In fact, Huawei Hisilicon, as a first-class chip design enterprise, began to conquer some components of RF components a long time ago, but Huawei still failed to conquer the core filter. Therefore, sanctions lead to no core filter. Therefore, it is impossible to produce 5G mobile phones