Huawei B683 is a legacy 3G wireless router that through a firmware update. Because the device's physical hardware is limited to HSPA+ (3G) and GSM (2G) antennas and chipsets, no software patch can enable 4G connectivity.
You will get two files:
The B683 is built on a 3G chipset (UMTS/HSPA+). It cannot be "updated" to support 4G via firmware because it lacks the necessary LTE antennas and modems. Performance: huawei b683 firmware update 4g 2021