@fiaxh @dino Exactly. Friends of mine show up on my device (app is Conversations) with heaps of keys. The list grows with every re-install or new device, while I cannot delete old keys because I don't know which ones are out of date.
I find this very annyoing.

@holgerjakobs @dino Having one key per device is they way OMEMO works, but I understand the issue.
However, the newly added call functionality does not affect the number of OMEMO keys at all. The existing OMEMO key of your client is merely additionally used to authenticate call keys.