The Xiaomi Mi A1 and OnePlus 5 are the best devices in their respective price range. Airtel , which rolled out VoLTE services in Mumbai and five other regions will be adding VoLTE support for both the Mi A1 and OnePlus 5 very soon as the company is internally testing VoLTE in both the phones. Currently, there are only limited devices which supports Airtel VoLTE , but the operator is working hard to get more devices on board at the earliest. Currently, Xiaomi devices which have support for Airtel VoLTE are Xiaomi Mi 5, Mi Max, Mi Max Prime, and Redmi Note 4. Also, as per our sources, only Mumbai customers who have a Xiaomi smartphone can enjoy VoLTE services and other region users with a supported Xiaomi device will have to wait a bit longer. As said earlier, Airtel has VoLTE coverage in Mumbai, Rest of Maharashtra & Goa, Gujarat, and Madhya Pradesh & Chhattisgarh. The service is in the testing phase in several regions such as Chennai, Hyderabad, and Kolkata. ...