Krishna_Kris , via OnePlus 6T , Oct 28, 2020 : Hi team, Seems like OnePlus 6T doesn't support VOLTE services in Vodafone or idea. It's been almost 2 years that Vodafone has launched VOLTE services in India but so far OnePlus hasn't focused on this issue and get it rectified. Could you please look into this issue and resolve it as soon as possible with the next OTA update. As it's been supported on other devices by Vodafone but OnePlus has failed to support this service. Thanks.