Even with updated firmware, you typically cannot broadcast 2.4GHz and 5GHz on the same SSID; they must be named differently.
This is the standard manual method using a computer or connected device. TeamViewer Connect to the Router huawei b612233 firmware updated
Go to Huawei Support → search “B612-233” → select “Firmware” → download the file for your region (e.g., B612-233_10.0.3.1_H186SP2C983_UPDATE.bin ). Even with updated firmware, you typically cannot broadcast 2