The OnePlus 2 just got a new update to OxygenOS 3.5.5, which brings a number of changes and improvements including voice over LTE (VoLTE) support.

Ever since it launched, the OnePlus 2 drew positive reviews and user feedback, but one of the most frequent complaints was that it did not come with VoLTE functionality. OnePlus released a number of updates in the meantime, but none of them brought VoLTE support until now.

OxygenOS 3.5.5: What's New?

With the latest OxygenOS 3.5.5 update, the OnePlus 2 gets VoLTE functionality at long last, albeit it will only work with select carriers. Aside from VoLTE, the update also brings some new features and improvements.

More specifically, OxygenOS 3.5.5 brings App Lock, Battery Saving Mode, Gaming Mode and shelf optimizations, adds extra options for the Alert Slider, brings an updated OxygenOS UI and redesigns the Volume Adjustment Bar. The Clock app's interface and UI get tweaks as well, and the update also brings the December Android security patch. As expected, some bug fixes and system stability enhancements are also in the mix.

Important Changes

Aside from the new additions, the latest OxygenOS 3.5.5 update also brings some important changes. First of all, the Clock, Messages and Calculator apps are now replaced by stock OnePlus apps for users who have never updated the corresponding Google apps. Nevertheless, users will still be able to download the apps from Google Play after updating their device, should they prefer to.

Another important and possibly inconvenient change is that the OxygenOS 3.5.5 upgrade will restore many of the smartphone's settings to default. Settings affected by this include the device name, ringtones, the battery indicator in the status bar and accent colors.

This might be an issue for some users, although re-optimizing these settings shouldn't be too much of a hassle. However, users who have upgraded to OxygenOS 3.5.5 and are not happy with the update can downgrade to version 3.1.0. To do so, check out OnePlus' Flashing Guide for detailed steps and instructions on how to roll back.

Lastly, OnePlus points out that OxygenOS 3.5.5 is rolling out over the air (OTA) as an incremental upgrade, meaning that it will initially roll out to a small percentage of users and expand its availability to reach all devices in the coming days.

If you've already received the OnePlus 2 OxygenOS 3.5.5 upgrade and tried it out, drop by our comments section below and tell us how it fares.

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