Huawei B683 is a and cannot be updated via firmware to support 4G LTE networks. Its hardware is physically limited to 3G, 2G, EDGE, and GPRS frequencies. While you can update the firmware to the latest available 3G version for security and stability, it will not enable 4G speeds. Firmware Update Instructions

While the internal modem is limited to 3G speeds, specialized custom firmware builds (frequently logged on open-source repositories like GitHub's Huawei Router Mods ) unlock hidden potential within the B683’s integrated .

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for connecting an analog phone to make calls over the SIM card's voice network. 2021 Utility:

for the progress bar to finish. Do not turn off the router during this process. The router will restart automatically. Troubleshooting "4G" and Firmware Issues Can the Go to product viewer dialog for this item. do 4G? No. If you need 4G/LTE speeds, the Go to product viewer dialog for this item.

If your B683 suffers from intermittent drops, fails to recognize modern SIM profiles, or runs on an unpatched carrier-locked interface, flashing the optimized firmware version is highly recommended. Prerequisites Huawei B683 3G UMTS HSPA+ 28.8 mbit/s Wireless Router