VoLTE can be enabled on the modem. However, there are issues with it at present. My understanding is that the problem is a firmware issue with the card.
I don’t know if there is firmware available that works and purism just needs a mechanism to flash it or if it doesn’t exist and is being waited upon, or both. At least for the BM818-A1, for the others I have heard people have had better luck with VoLTE.
I don’t think anyone disagrees that this is a big issue. However, based on this report it sounds like the pinephone pro is also rough around the edges at present (general estimates are on the end of the year for it’s hardware being ready that I have read).
It also turns out that T-mobile is turning off it’s 2G at the end of the year. AT&T has supposedly shut down 2g years ago, and 3G at the beginning of the month (thus calls without volte should not be possible with AT&T). Thus it seems the L5 has until the end of the year to get that working.
Thus my plan it to wait until October and see where things stand. If the L5 isn’t ready by October, my intention is to buy a Pinephone Pro and donate some to purism for the software development. I’d rather purism succeeds due to doing a lot of the heavy lifting in terms of software though.