I'm waiting the latest update version availability for Voice calls features in Asia (04/04/2017) | Well done  just a few days I have submitted a short review about still waiting for the latest update for voice calls features  today (06/04/2017) I got an update that voice calls features is available and I can use it well. Thanks to Telegram Developer Support Team. That was great  super crystal clear sounds  speed & secure!
April 06 2017