Looking for a guide on configuring LTE band aggregation

[schxx]

Hi
I have got router ZTE MF289F with OpenWrt installation done (fw 23.05.2). It supports up to 4 bands being aggregated and I am looking for a starting point on how to enable and configure LTE band aggregation using OpenWrt. I will be using only internal antennas, on a stock firmware it proved to be enough for that location.

I was looking for configuration guides but I mostly found only information on how to enable LTE modem and configure connection using one band.

[AndrewZ]

There is no control over CA on the host side, e.g. OpenWrt.
CA is negotiated between the modem and the carrier, the host system is not involved.

[schxx]

I am not sure if I follow, sorry if something I say may be trivial. What I am trying to find out is something like this (the image is not from the same exact router but the panel was identical)

on a stock firmware I was able to choose bands to which the router will connect. In my case due to the location I need to force it to connect to B1, B3, B7 and B20.

Is it possible using OpenWrt, if not how will it behave?

[frollic]

LuCI JS APP: Luci-app-modemband (Set LTE/5G bands for selected 4G/5G modems) ?

[AndrewZ]

That has no direct relation to Carrier Aggregation, this is about (dis)allowing individual bands or component carriers. Please bear in mind that even you will limit your modem to B1, B3, B7 and B20 there is no guarantee it will negotiate 1+3+7+20 aggregation.

You either need to know the AT command(s) to configure this manually (from a terminal app like picocom) or you need to install a 3rd party package in order to do this from the GUI (obviously, if this modem is supported by the package).