Hello, Currently Asus does not have VoLTE enabled in Estonia on Telia network. You have Telia already in Lithuania, Finland and Norway but not in Estonia. I contacted Telia Estonia and they checked with their technical team who said that Asus has not yet contacted Telia Estonia on the issue. Their team also said that they are ready to cooperate and work together towards veryfying, validation and enabling VoLTE in Telia Estonia but Asus needs to contact them. Telia team also said that you already have the Telia VoLTE configuration info because of enabling Telia in other countries so you can already begin the work.
Will you please start the process and contact Telia Estonia?