Set allowed mode to 2G, 3G, 4G not working

[Aleksander Morgado]

>
> But setting the preferred mode fails.
>
> mmcli -m 0 --set-preferred-mode=2G
> error: setting preferred mode requires list of allowed modes
>

This is expected; you only want to set a "preferred mode" if you're
configuring multiple "allowed modes".

E.g. if you just want 2G, you would do:
  --set-allowed-modes=2G
If you want 2G+3G with 3G preferred, you would do:
  --set-allowed-modes="2G|3G" --set-preferred-mode=3G

-- 
Aleksander
https://aleksander.es