Laptop broadband don't work

Hay,

I have a SIM card in my laptop for broadband internet. It worked fine with the previous version of Mabox I had installed. But since updating to the latest version, 25.12 and now 26.03, it has stopped working.
I create a new broadband connection, select my country, select my mobile carrier, and it creates a new entry. When I select the entry, it connects as (Orange LTE) but with practically 0% coverage (sometimes 16%), and although it seems to be sending packets, it isn’t receiving any, so I can’t browse the internet at all.
How can I fix this?

Thanks

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En el portatil tengo una sim para conectarme con banda ancha a la red. Con la anterior versión de Mabox que tenía instalada me funcionaba correctamente. Pero desde que he actualizado a la última versión 25.12 y ahora 26.03 ha dejado de funcionar.
Creo una nueva conexión de banda ancha, selecciono mi país, selecciono mi operador de telefonía y me crea una nueva entrada. Al seleccionar la entrada se conecta como (Orange LTE) pero practicamente con 0% de cobertura ( a veces 16%) y aunque parece que sí envia paquetes, no recibe en cambio ninguno, no pudiendo navegar en absoluto.
Cómo podría solucionarlo?
Gracias

You running kernel 6.12.

First: Try another kernel and see if that helps.

I’ve tried with kernel 6.6. and 6.18. and the results are the same, no connection

Is possible to make manually the connection, without the gui?

Thanks!

Look into nmcli .
It is the terminal version of networkmanager.

so far, no results.

I tried the Modem Manager Gui to run and don’t works:

Hi @JuanD

I am not sure we can help you here with the modem.

Plus you need to give more information, than just this don't work.

Read about how to post a issue.

For posting code you paste the output from the terminal between ``` paste the code between ```. Or use Ctrl -e.

We cannot debug your code from a picture.