I have spent some time looking for a solution, but I just cannot find one taht suits my situation. I have a toshiba notebook with a built-in sim card. Running Ubuntu 18.04 with little hiccups.
About 3 weeks ago, I was able to connect to the internet using the built-in sim card, however, it all of a sudden stopped one morning. When I click on Connect, or switch the mobile data to On, the system attempts to connect for a while, then pops up with the following error:
Connection Failed. Activation of network connection failed"
I believed that this was due to the sim card, so I have replaced it, and am now using one that worked 100% in the past with the same device. Still having the same issue.
I have edited the connection settings, cleared them totally, created new ones, but still no success for now.
I am a newbie to Ubuntu,so any guidance in resolving this would be great.