Install gsm0710muxd by entering the following commands in the terminal:
sudo apt update sudo apt install gsm0710muxd
Description:
GSM 07.10 Multiplexer
Pyneo mobile stack is a muxer for GSM modems to allow more than one channel to be used with the modem. Each channel can be used to issue phonecalls, watch signal strength, receiving sms or even doing ppp (GPRS) at the same time. . Access to the multiplexer is managed via D-Bus.
Homepage: http://pyneo.org
Version: 1.13-3build1
Section: universe/misc