The OnePlus 2 gets updated to OxygenOS 3.5.6, but it’s not Android Nougat

The OnePlus 2, released in 2015, was not really a candid device to be favoured for updates, given its age. However, OnePlus seems to want to break that mould and pushed an update to the OnePlus 2, bringing OxygenOS 3.5.6, albeit staying on Marshmallow. It is one of the largest update we’ve seen for the OnePlus 2 with the UI/UX being redesigned to fit with the family of the newer devices.


With the update, comes a hefty list of changelog:

  • 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

Although the above screenshot mentions the update size to be 17MB, this was an incremental update over OOS 3.5.5. OOS 3.5.5 update was halted due to major issues with the Dual SIM functionality. VoLTE would cause both SIMs to drop connectivity constantly and this made the device almost unusable. Fortunately, OnePlus quickly pushed out OOS 3.5.6, which is available currently, which solves all the above issues. The total file size comes around 1.4GB, so you might want to connect to a WiFi connection before updating.


Although the core OS of Marshmallow remains the same, there are numerous additions bundled with OOS 3.5.6.

The OnePlus 2 FINALLY gets native VoLTE support. This was the most requested feature by the community and the company has finally delivered on the promise. Along this comes native App Lock support, which also allows you to use your fingerprint. Gaming Mode is also a new along with a few more additions in the Developer Options menu. There is also a toggle to turn off Doze Mode, if you wish so. A new System Wide Theme called “Light” is also added along with the Night Mode which alters the color temperature, are present in the Display section.


There also seems to be a significant change with the notification bar. It has been redesigned to the aesthetics of Nougat, along with the animations. This is pretty odd, as OnePlus decided to port over the notification aesthetics from Nougat, but kept the same functionality. The Slider has also seen a UX change, for better or worse. The alert slider cannot be set to vibrate directly, but one must toggle the hardware notification slider up to set the device to vibrate. Many users in the community dislike this change and this UX change is also seems to be carried over to the OnePlus 3/3T. The stock apps, such as Calculator, Gallery, Phone, Clock have also been replaced by OnePlus’ alternatives. This is not that big of deal as the apps are similar to stock. Google Duo is also added as a system app.

How has been your experience with the update? Did you too hope for Nougat? Let us know in the comments section