After upgrading to fedora 36 my modem stopped working. I tried reinstalling, but it didn’t help. Other distros have no problem picking it up and using it. After that, fedora can use it until the first sleep, then it’s broken again.
I did them on Win10 as a fresh install, F35 (ISO v. 1.2) and F36 (ISO v. 1.5) both as live ISO-s.
Win10 and F35 succeeded both tests, but F36 failed at reconnection after suspend. After that even a reboot wouldn’t fix it. Only booting F35 or Win10 would. After that F36 could connect to the network once.
I tried to update to the latest firmware in my Dell (Windows). There was an error downloading the firmware so the update didn’t happen and also it put the modem to a low power state, so I couldn’t use it at all.
I removed this modem from Dell and insterted it in a Lenovo (Fedora36) and updated to the latest firmware SWI9X30C_02.38.00.00
I then again tried your steps.
Connected to mobile network.
Suspended the laptop.
After few minutes I pressed ESC and the screen reappeared. There was no signal bars and no mobile broadband in the drop down menu.
After few seconds, the signal bars and the mobile broadband appeared in the drop down.
So in my case both firmwares worked after suspending the laptop.
I still have to check if my modem disconnects automatically due to low signal strength.