Basebands of 1 and cat 18 belong to 4.5glte technology, which can realize the download rate of 1.2gbps and belong to 4g+ networks.
2. Downlink supports Cat. 12, that is, the maximum download speed is 600Mbps, and uplink supports Cat. 13, that is, the maximum upload speed is150 Mbps; 1 byte = 8 bits, then the corresponding download speed is 600/8=75MBps (bytes per second), and the upload speed is 150/8= 18.75MBps (bytes per second), which is not up to the current domestic network speed, and the downlink speed of cat.4 is/kloc-