The Snapdragon X24 LTE modem has a theoretical peak of 2,000 MHz using ?140 MHz of spectrum and 4x4 MIMO.
In the real world, expect 100-600 megabits typical. This is a heckuva chip, one of the first 7 nanometer chips produced. While none of us require more than 100 megabits 99% of the time, but the total capacity is also important. The speed will be divided among the many users of the cell.
Real world speeds vary from lab speeds because cells will have more than one user, greater distances, varied topology, and other interference. There will be times when you are the only user and in the exact right spot and can get close to the peak speed. It's likely that users at the edge of the cell will see the greatest improvement.
140 MHz is very rare outside of the laboratory. Verizon and AT&T only have about 100 MHz, total. They expect to take over the Wi-Fi spectrum