Enabled VoLTE functionality for select carriers

Added App Lock

Added Battery Saving Mode ( Settings > Battery > More )

Added Gaming Mode ( Settings > Developer Options )

Added Additional Options for the Alert Slider.

Redesign of the Volume Adjustment Bar

Shelf Optimizations

Updated OxygenOS UI

Updated Interface and UI of the Clock app

Updated Android Security Patch Level to 1/12/16

Increased System Stability

General Bug Fixes

Clock, Calculator and Messages will be REPLACED by stock OnePlus apps if you have never updated the corresponding Google apps. But you can download these apps from Google in the Play Store even after the replacement.





Many of the phone settings will be restored to default after upgrading to 3.5.5, for instance device name, ring tones, accent colours and status bar battery indication will all be reverted to default settings.





After updating to 3.5.5, basic functions like WiFi connectivity, Network and Fingerprint might be affected if users flash back to 3.1.0. Users will have to use a special 3.1.0 downgrading version and flashing tool that will wipe all data from the phone. You should backup if you want to revert to older versions from 3.5.5 without losing data.

Hi all,We are starting the incremental roll-out of OxygenOS 3.5.5 for the OnePlus 2. Here are the changes for this build.Here are some highlights:Important:*** To downgrade from 3.5.5 to 3.10, please refer to our Flashing Guide here for the necessary files and steps to perform this process: https://docs.google.com/document/d/1adh17i1Xrm2uo8DI4E7ykWc_8MS9vFF8zsVaQZaIVww/edit?usp=sharing For those who were on previous versions for the OnePlus 2, we appreciate your active feedback and attempts to reach out to us. With your help, we have been able to better optimize and improve several key areas. Thank you for your patience and as always, we look forward to hearing your continued feedback in the bug reporting forum here: https://forums.oneplus.net/feedback/ As this update will move you to the new Oxygen UI, please follow the link below for the UI/UX experience survey. We’d really appreciate a few minutes of your time, as it will help us make OxygenOS even better.As always, this OTA will be incremental. The OTA will reach a small percentage of users today, and we'll begin a broader rollout in a few days.Your feedback is appreciated. We may not always be able to respond to every comment in the forums, but please be assured that we take your comments and feedback seriously. Hope you enjoy!Never Settle.