So far we’ve only seen this in the new Samsung S23 series, but it will be in all of the top end Android phones released this year as well as likely in at least one of the iPhone 15 models.
This modem is what makes the Samsung S23 Ultra the current top 5G device. One area where Qualcomm has been making significant strides in the last couple of generations including this one is acquiring and holding a signal in marginal areas where typically there may be only one tower available. (Or in big buildings as the article points out)
Tomorrow’s Top-Tier Android Modem Promises to Boost Lackluster 5G Signals - CNET