Lock the band and try again - by using manual connection you can lock to specific bands so that it won’t downgrade to 3G.
For locking band, I did it with previous firmware but not the beta one yet, I locked it with LTE band 3 and NR5G band 78, but it will eventually drop back to WCDMA.
I also tried just lock NR5G band 78, but it will not able to connect to the APN, seems it required to use LTE band 3 as well.
I am thinking if there is setting to disable WCDMA, I have tried look into Luci, but with no success.
Thank you.
Correct as the current 5G technology is built upon LTE.
There is! Check my other posts where I linked the AT manual. In that manual you will find the AT commands to do whatever you want on the modem such as locking bands, disabling wcdma …etc
I see, will you please share the AT manual link again? Since I am not able to locate it.
Thank you.
Click on my username and find my posts
Here it is
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Thank you very much, I will look into it and check it out later. Will let you know the result.
Hello again SpitzAX3000,
After 3 days of testing, I can confirmed that the AT command is working perfectly to maintain the 5G connection, which helps a lot, thank you so much.
And I still have few questions, can you help to look into it as well?
- After forcing the AT command to use 5G network, but once we have made changes to the APN, it will reset the mode_pref back to AUTO again, is this normal?
- If my network was in 3G, after switched to force to use 5G network with AT command, the connection will fail (cannot jump back to 5G itself) until I reset the modem or device.
- I am not sure if this is carrier or modem problem, I realize that the SIM card connection will drop randomly for few seconds in every 30-60 mins (the router do not move and stay in the same position), since I have remote device connected to it, so I need to manually reconnect the remote device again after the connection drop. Do you know if there is the way to force the modem not to disconnect randomly?
- Related to question 3, today, i have encountered this problem twice, the connection will not able to reestablish after the disconnection, this device will suddenly show SIM card is not registered, and I will need to reboot the modem or device to make it work again, do you have any thoughts about this?
Thank you so much for your help again.
By looking at my logs, I can see the same behaviors:
By digging deeper, it seems that these AT commands are hard-coded in the script /lib/functions/modem.sh
# grep -rn 'QNWPREFCFG' /lib
/lib/functions/modem.sh:60: eval gl_modem -B $bus AT \'AT+QNWPREFCFG=\"lte_band\",$bands\'
/lib/functions/modem.sh:63: eval gl_modem -B $bus AT \'AT+QNWPREFCFG=\"nr5g_band\",$bands\'
/lib/functions/modem.sh:66: eval gl_modem -B $bus AT \'AT+QNWPREFCFG=\"nsa_nr5g_band\",$bands\'
/lib/functions/modem.sh:93: eval gl_modem -B $bus AT \'AT+QNWPREFCFG=\"mode_pref\",AUTO\'
/lib/functions/modem.sh:94: eval gl_modem -B $bus AT \'AT+QNWPREFCFG=\"nr5g_disable_mode\",0\'
...
...
truncated
So if you need to make it persistent, you need to modify this script by hand.
Alternatively (I did not test it though), try to use the Manual Setup and save a new profile after entering the new APN and choose your preferred bands:
I did not get that.
Yes, this is known issue and people all over the forum talking about it. It is said that it has been fixed in the latest beta release: GL.iNet download center
Try soft modem reboot instead of rebooting the device.
Well noted.
I have already limited the band in APN instead of AT command.
I am now testing the latest beta firmware, will let you know how it goes.
However, I have found out that the soft modem reset is gone in the latest beta, only AT command part left in the modem management.
GL engineers can you please comment on why the soft reboot has been removed ?
I will be testing it this weekend too! Please share your feed back. Thanks.
Hello again SpitzAX3000,
I have changed from beta to stable firmware again with previous settings.
The end result is not as good as expected.
With AT command, I can maintain 5G/4G connection, however, I have encountered several disconnections each day, the system will normally disconnected for 10 - 20 mins each time.
With my layman idea, I was thinking if it is related to band filter (open for 3 LTE, and 78 5G) in the APN setting, so I have removed band filter.
However, the result is getting worse, more disconnections, still looking forward to another new firmware which can maintain stable connections.
Which carrier is your card from? csl?
Thanks!
Hello Lizh,
it is correct, CSL with lte.public APN.
Thank you.
CSL needs to lock in the LTE band.
And it doesn’t actually support 5G, just 4G+.
Thanks!
I see, so which band should I lock?
And my plan was 5G plan, so it is 5G?
thank you.
I have been doing several testing in the past few days with current stock firmware.
- Hardcoded - modem.sh to force LTE and 5G connection.
- Plugin - installed keepalive.
The connection have been very stable for 3 days, however, today encountered disconnection and required hard reset.
Found another beta firmware 4.3.4 today, updated and testing the connection, will report back again.
But in the 4.3.4, already found the first bug, goodcloud is not functioning and cellular profile will not show open band after save.
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Updated to the stable version, goodcloud is back.
However, still encountered complete disconnection randomly, found 2 issues.
- Disconnected and will reconnect after logging into the UI (no need to reboot, weird).
- Disconnected and will need soft/hard reboot, encountered a line meaning “cellular connected but router cannot access internet” (not sure if this is the actual wording since I was in hurry to fix the network)
Hi hkm:
Thank you very much your feedback.
-
Disconnected and will reconnect after logging into the UI (no need to reboot, weird).
—> I don’t quite understand the meaning here. Can you help have a screenshot? -
Disconnected and will need soft/hard reboot, encountered a line meaning “cellular connected but router cannot access internet” (not sure if this is the actual wording since I was in hurry to fix the network)
—> You can change the local nameserver in the image below.
