This used to work in the initial version I received, but after last two updates (running latest update from today), this is no longer an option. Network is Vi India. I have good 2G coverage but poor 4G, and it always takes 4G. I don’t get an option to force 2G.
the option was disabled for now as it caused some stability issues. for next months updates, we are working on improvements to the modem stack that fix all stability issues. it will be brought back soon
I hope this month’s update will bring that back. Else at least add a logic to pick strongest Signal when dialing or receiving a call. I currently have a very weak 4G so calls are broken even when 2G coverage is good. On Librem 5, I still have that choice and I can make calls via 2G.