Voice over Long-Term Evolution (VoLTE) is a standard for offering high-quality HD-voice communication wirelessly over 4G LTE network, being a new technology even 4G capable mobile devices need addtional hardware and/or software support to be VoLTE compatible. Today we will see how to flash and upgrade the latest Oxygen OS 3.5.7 ROM on OnePlus2 device to enable the VoLTE capability for Reliance Jio network in India.

The much touted, affordable, flagship killer phone OnePlus2 was being bogged down by a "not so refined" Oxygen OS. Thankfully, after a long wait - Android Marshmallow 6.0.1 based OxygenOS 3.0.2 update for OnePlus2 has started to rollout for users now via OTA update in a phased manner.

"This update is packed with new features and enhancements. One thing to note is that this update will clear your stored fingerprints. If you have fingerprint authentication setup, you will need to re-enroll again before use."

Here are some of the highlights of this update: