I specifically asked for the -n flag in the inxi to have you show us the basics of your network. NOTE: This is not going to allow us to do evil things to your computer.
I have no bluetooth on my 4-10 year old boards. So I always remove - purge modemmanager. It has a gui I see
aptitude show modem-manager-gui
Package: modem-manager-gui
Version: 0.0.19.1-2
State: not installed
Priority: optional
Section: net
Maintainer: Graham Inggs <ginggs@debian.org>
Architecture: amd64
Uncompressed Size: 1,641 k
Depends: mobile-broadband-provider-info, modemmanager (>= 0.5.2) | ofono (>= 1.9), network-manager (>= 0.9.4.0) | connman (>= 1.12) | ppp (>= 2.4.5), policykit-1, libappindicator3-1 (>= 0.2.92), libc6 (>=
2.16), libcairo2 (>= 1.2.4), libgdbm6 (>= 1.16), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.37.0), libgtk-3-0 (>= 3.21.4), libgtkspell3-3-0 (>= 3.0.3)
Recommends: modem-manager-gui-help, yelp
Suggests: evolution-data-server, libindicate5 | libmessaging-menu0, libnotify4
Description: GUI front-end for ModemManager / Wader / oFono
This program is a simple graphical interface for ModemManager, Wader and oFono daemon D-Bus interfaces. It can send, receive and store SMS messages, send USSD requests and read answers in GSM7 and UCS2
formats, and scan for available mobile networks.
Homepage: https://linuxonly.ru/page/modem-manager-gui
Tags: uitoolkit::gtk
You can install and give it a try. It has been vetted by Debian to not have grievous faults. I have never used.
| denotes either. Therefore the " network-manager (>= 0.9.4.0) | connman (>= 1.12) | ppp (>= 2.4.5)" lets you know that it can be used with either network-manager or connman (or ppp).
https://packages.debian.org/sid/modem-manager-gui