The Qualcomm Snapdragon modems are a series of 4G LTE, LTE Advanced, LTE Advanced Pro, and 5G NR modems found in many phones, tablets, laptops, watches and even cars.
The Qualcomm Gobi series was their modem branding before they switched to the X-series.
The Qualcomm Snapdragon X-series modems are the current line-up of 4G LTE modems.
[3] The first Qualcomm modem with PCIe inter-chip link type.
(FDD-TDD, FDD-FDD, TDD-TDD), FDD-TDD support for uplink-CA, Dynamic Spectrum Sharing (DSS)