cannot
To achieve 5g, in addition to the chip itself does not support 5g, the P50 mobile phone of the Snapdragon 888 chip is specially customized by Qualcomm for Huawei, from the beginning of the chip to castration 5G function, only 4G function, unless the chip is changed later, it is impossible to increase 5G radio frequency chip to achieve 5G function. If you buy the Kirin 9000 chip version, then the chip itself has 5G baseband, and in theory, 5G radio frequency chips can be added to support 5G functions. But if you install it yourself, it is estimated to be very difficult, because the RF chip is not a chip, but a combination of chips, including antenna Switch (RF Switch), Filter (Filter), low noise amplifier (LNA) and power amplifier (PA) these four categories.