No volte icon on Lenovo vibe k5/k5 plus

<%= @topic_view.topic.title %>
<%= @topic_view.topic.average_rating %> <%= @topic_view.topic.posts.count { |p| !!p.custom_fields['rating'] } %>

There is no provision of volte Icon on statusbar though volte working on Lenovo vibe k5/k5 plus
Mokee 8.1.0-a6020
Requesting you to please add volte icon.