[Lenovo Vibe P1 Questions & Answers] Atharkhan101:
In order to get VoLTE, each user need to contact the Lenovo tech support team. Before contacting them you need to keep the Lenovo phone box near you as you need to enter the IMEI number or Serial Number and then you can contact / chat with them.

I strongly encourage all users of this phone to contact Lenovo team and bug them with your request. Below is the link to contact them and the chat I had with them:

http://support.lenovo.com/in/en/contactus

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RAVI (Listening)

RAVI: Hi, my name is RAVI. How may I help you?

Zaheer Ali: Hey Ravi

RAVI: Hello Mr. Zaheer ,Good afternoon, how may i help you?

Zaheer Ali: Do you know this Lenovo model http://www.gsmarena.com/lenovo_vibe_p1_turbo-7918.php

RAVI: Please wait for a while .

RAVI: Thank you for being online .

RAVI: Could you please explain your phone issue ?

Zaheer Ali: This Phone is awesome like so many features

Zaheer Ali: I have purchased this lenovo product but later I discovered that it is lacking just one feature which is very popular these days that is voLTE (Voice over LTE)

RAVI: Okay.

Zaheer Ali: Everybody is enjoying the free sim cards provided by Reliance Jio sim

Zaheer Ali: Except me

Zaheer Ali: This is very much disapointing

Zaheer Ali: One of my friend purchased Asus zenfone and he did not had voLTE support then he wrote an email to Asus guys and they released an update which enabled the voLTE in his phone

RAVI: I would request you please wait for update you may get volte feature after update i will also inform to our concern department to release the update .

Zaheer Ali: Now he is very much enjoying the resolution provided by Asus to his concern

Zaheer Ali: Please Please Please dear Ravi let the development team know that there are so many customers of this Lenovo P1 Turbo product and they all are asking for voLTE

Zaheer Ali: Please cut a trouble ticket and mention that the Hardware is supporting voLTE but you have to do some software work like Asus guys did with my friend

RAVI: Mr.Zaheer we will also take this as feed back too and will inform our team to release the update so that you may get it soon .

Zaheer Ali: I researched for the most featured phone and I got this phone as a result but I'm a bit dissapointed when I came to know that voLTE is supported by its hardware but software wise its disabled.

Zaheer Ali: Lenovo should do like Asus, just release a fix or patch or software upgrade to enable voLTE

Zaheer Ali: Please cut a ticket now and let me know the ticket number because I will keep on contacting Lenovo for update on the ticket

Zaheer Ali: I'm having sleepless nights man I researched for 2 months and purchased this phone but there is no voLTE support

RAVI: 170119-018716 this is your id .

Zaheer Ali: What is this ID for

RAVI: This is interaction id for this conversation .

Zaheer Ali: Man I do not want interaction ID

Zaheer Ali: I worked in technical support earlier

RAVI: If you contact again for the same issue please provide the same .

Zaheer Ali: there would be a development team where you create a ticket or raise an issue to them and they give us (customers) a ticket number

RAVI: We do not have such facility in chat to raise the ticket but you can write at smartphonets@lenovo.com concern team will revert you back .

Zaheer Ali: Else connect me to your developement team I will explain on behalf of all the customers who are having this model

Zaheer Ali: Did you understood clearly what feature I asked for can you summarize my request now

RAVI: We would not be able to connect to developer team because there is no such option we have i would request you to please write at given mail id concern team will revert you back

RAVI: Yes Mr.Zaheer you want volte feature in your phone that is not available now .

I would request you to please wait for update .

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Thanks,

Athar

Senior Tech Support Officer.

I also have submitted the mod request for VoLTE in the link below, I request you to create a new post with your request for VoLTE mod:

https://xdaforums.com/showpost.php?p=70531195&postcount=11545