4G-LTE Band Lock
In some rare conditions, such as between two different cell towers, we need to lock the 4G router to works on a specific band to achieve a stable connection or faster speed.
Mobile Data protocol
While using the firmware EV3117 or later version, the mobile interface connects to the cellular network via the Mobile Data protocol.
If you are using a legacy firmware version, please download firmware at https://ezen.link/ev3117-33.
After flashing the new firmware, go to the mobile interface page (as the below right side image shows), then click the button Save & Apply to activate the long path modem device.
The mobile modem located at the long path of /sys/devices/platform/ehci-platform/usb1/1-1/1-1.3
Verify the Modem
After accessing the router admin, go to System > Terminal and access the web terminal. You can also access the router's command-line interface with PuTTY or similar software.
Firstly use the below command to check the supported bands and current working bands.
mmcli -m 0
Lock Network Mode
The modem connects to the mobile networks by the configured mode, then choose the network bands which has the strongest signal strength.
For example, the above demo modem use the default mode of allowed 2G, 3G, 4G, preferred: 4G.
We can use the below command to lock the router connects to 4G mode only.
mmcli -m 0 --set-allowed-modes="4g"
If you need to revert the above 4G only mode to default settings, please use the below command.
mmcli -m 0 --set-allowed-modes="2g|3g|4g" --set-preferred-mode="4g"
Lock 4G-LTE Bands
Before deciding the specific network band, we need to check it's signal strength. You can refer to the tutorial to check the signal bands on a mobile phone APP. Field Test 4G Mobile Signal Strength
We can use the below command to lock the band, for example, utran-1.
mmcli -m 0 --set-current-bands="utran-1"
We can also lock the router to work on multiple bands. Make sure use a double quotation mark to define all of the multiple bands with | symbol between each band.
mmcli -m 0 --set-current-bands="utran-1|utran-8"
The set bands command will return a success or failure message, then we use the commandmmcli -m 0 to verify the current working bands.
If the mmcli command return with a failure message, please recheck your input commands, make sure to use the correct format and the band must be supported by the modem. Please run a hard reset by unplugging the power supply to activate the new settings.
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