A new IHS Markit teardown pitted early 5G smartphones against each other. And one of the revelations of the report is the weaknesses of Huawei's 5G chip. It's been found to be larger, less efficient, and more expensive than its counterpart from Qualcomm and even Samsung. The Kirin 980 chip already has a 4G/3G/2G modem, but the addition of the Balong 5000 5G modem renders the former redundant. Huawei says the Balong 5000 5G is the first commercial multimode 5G/4G/3G/2G chip. This additional chip takes up more space, which made the Mate 20X larger than it should be. Aside from being less efficient, having two modem chips in one phone is also more expensive. And at this moment, it still doesn't support millimeter 5G. It seems Huawei still has a lot of work to do to make a better 5G modem for its smartphones.
Source: GSMArena