Volte outgoing calls end after first tone
On Xiaomi A2 jasmine_sprout To be able to make calls, it is necessary to disable the 4g calls option. If the outgoing call is not established on the first tone it will end.
The inbound calls have no problems. Calls with 4g calls disables work just fine.
Tested with the Spanish operator "Movistar", with 2 SIM cards and only 1 card and in both slots. The 4g calls must work with this provider.