Call waiting issue

[zetabeta]

So I revisited this and got it to work but it is not a great outcome. I still wanted to post how-to in case this can help someone down the road...

Hello!

Is this solution working for you with VoLTE calls?

My carrier (DNA, Finland) told me this:
This and USSD codes are only for 3G or 2G calls.
If Call waiting is disabled and you are in 2G or 3G (DNA) the call does not end up to the phone at all if the line is busy
In VoLTE (DNA) call will go trough but it can be stop with phone own setups - in this case it should be Gnome Calls but as we know it is not ideally working currently

how the user inteface is built in pinephone o.s., i recommend disabling call waiting altogether.

i'm not sure though, but call waiting works with volte, if device has user interface for it. but i haven't used call waiting for years. so, i don't know how well call waiting works with volte.

however, those special commands like call waiting, call forwarding, ussd and possible others do not (mostly) work on volte. they may (not) work on lte network, regardless is volte operational or not. still, when doing those commands, i recommend downgrading to gsm(2g) or umts(3g).

instructions on this thread is, how to disable call waiting until support for it is better.