Huawei — When will volte support in nexus 6p in india?

Address:

Ranga Reddy, Andhra Pradesh, 500049

HI,

I am using nexus 6P.

I have contacted to huawei.
They said to me... Volte feature has requirement hardware changes.

I have contacted to Google through mail but they was not relying.

Please find below research regarding volte.

The Nexus 6p has a Qualcomm MSM8994 Snapdragon 810 processor.
for more info. https://www.qualcomm.com/products/snapdragon/processors/810

This processor has support volte features.
Next-generation Calling Services
Voice over Wi-Fi (VoWiFi) with LTE call continuity
HD Voice over 3G and VoLTE

I have posted question on google forum.
https://productforums.google.com/forum/?utm_medium=email&utm_source=footer#!msg/nexus/6RHuijNfAYU/5MvinQvtAQ...⇄

The Nexus 6p has supported below bands in world. (Exclude: North America)

GSM/EDGE: 850/900/1800/1900MHz
UMTS/WCDMA: B1/2/4/5/6/8/9/19
TD-SCDMA: 34/39
CDMA: BC0/1
LTE (FDD): B1/2/3/4/5/7/8/9/17/19/20/28
LTE (TDD): B38/B39/40/41
CA DL: B1-B5, B1-B8, B1-B19, B3-B3, B3-B5, B3-B7, B3-B8, B3-B19, B3-B20, B3-B28, B5-B7, B7-B7, B7-B20, B7-B28, B39-B39, B40-B40, B41-B41

Note: Volte feature had supported in USA & UK same device but not in India.

Can you please give me valid reason for volte.