On the afternoon of August 23, a release of the hydrogen OS 2.5 public beta system was released. This is the most dramatic change in the history of the hydrogen OS, and it is also a sign that Uniplus has begun to unify at the system level. However, for domestic users, this change is good or bad, and it is still not conclusive.
The official release of the test version of the system, providing card brush package, but did not carry out OTA, and temporarily only provide one plus three ROM. To a plus forum or hydrogen OS official website to download card brush package, the volume is 1.21G, ROM's body can guess how simple the system is. System Upgrade - Settings - Local Files, select the just downloaded ROM to flash.
Left is hydrogen OS2.0, right is hydrogen OS2.5
The kernel and baseband versions before and after the system upgrade have not changed and will not clear the original data. The first thing we need to do here is that when we add a mobile phone, we will win a lot of users abroad with our cost-effective and Cyanogen CM ROM. Later, they parted ways, one plus a mobile phone in the launch of the 2 plus a custom ROM, the foreign version is called OxygenOS (oxygen OS), the domestic version is hydrogen OS.
Before Hydrogen OS 2.0 Desktop
The main features of the two versions are very simple and interesting. The oxygen OS used abroad is known for its rich and detailed animations. It maintains the look of native Android, while the domestic use of hydrogen OS is a very special domestic ROM, card type hydrogen window (desktop The upper 1/3 is a dedicated wallpaper display window, click to enter the calendar / notes / card coupon list), cancel the desktop plug-in widget, no dock bar, etc. are very rare settings. However, the two versions have in common that they are all at the stage of completion of the function, and the built-in app has no common domestic ROM improvement in function.
One added to the beginning of hydrogen OS2.5, slowly began to merge two versions of the system. However, the bad news is that the custom-made hydrogen OS is integrated. This upgrade can be summarized as the addition of some hydrogen OS features to the oxygen OS framework. The exaggeration is to change the oxygen OS to a skin.
In the eyes of users accustomed to domestic ROM, this is actually a retrogression and it has been announced that many of the customizations made by domestically tailored hydrogen OS have been abandoned. Of course, these are all emotional. It is another thing to use. In order to facilitate comparison, the following will be inserted from time to time screenshots of hydrogen OS2.0.
System level 
Leftmost hydrogen window and desktop
Uniform colors and sorting is also a native settings page
Native style (Android 7.0) notification bar
Multitasking page and shutdown page
The new system interface is closer to native Android. The original colorful design style is unified to the unitary light color system close to the original, but the overall visual perception is consistent with hydrogen OS 2.0. A more detailed animation is even more "intensified" under the more native interface. Clicking on the search bar, buttons, etc. have a full and rich transition of the Material Design (animation design) animation.
Changes in system interaction levels can be summarized as the following:
Set the page to return to the native system layout and join the search box conscientiously. However, the original colored icons have become uniform colors and are even simpler. The setting item classification is not as simple and clear as before.
The notification bar returns to the native specification. The first pulldown is a few commonly used shortcut buttons. The dropdown is all display again. The shortcut button position can be customized. However, as the price of the widely acclaimed pull-up control bar was canceled as a whole, the author expressed considerable distress.
The multitasking interface directly displays the application lock icon. The original long press task card will show the background lock icon, and now it has finally become the default display.
Other changes that do not have much impact include: Do not disturb the mode details adjustment item increase, increase the restart button, apply the notification page to return to the native style, and so on.
Access to the computer to manually select the MTP ... Samsung, Huawei have changed, the new version of the system is instead the default USB charging ... ...
Somatosensory and information screen gestures, black theme, notification control
Enhanced key customization
Previous Hydrogen OS 2.0 Management Center
Self-start control, application management, setting list search
Highly enhanced key customization: The three King Kong keys support long-press and double-click function customization, providing virtual keys and Home key shielding options. These functions that can only be achieved by a third-party app+root, their geek level is even better than the MIUI of the heyday.
Information screen and somatosensory gestures: This is the earliest part inherited from OPPO's Color OS, and the new system is also preserved. Double-clicking on the bright screen, interest gestures to start the camera, flashlight, music control, and three-finger screenshots are all pretty good. Used functions
Black theme and native theme: The former is quite meaningful for current AMOLED material screens
The management center was canceled: The management center app was dismantled and integrated into the system settings, which is the most controversial change. Generally only developed to a certain extent, there are quite abundant
This app is the largest access to domestic ROM and native systems. Garbage cleanup, traffic monitoring, harassment and interception, rights management (including self-start control), and power saving management are each important tools for dealing with the domestic Android garbage ecology. Some parts of the new system were canceled, and the rest were placed in the second and third level setup menus. It has to be said that this is a down-to-earth retreat, and we hope that the authorities can rejuvenate the management center as soon as possible.
The management function of the ROM will be independent of the management center's app, but it will cancel it instead...
desktop
Hydrogen Window Customization Project
Desktop and Icon Options
Desktop plug-ins, wallpapers, icon labels, and theme changes
The changes on the desktop are the most obvious, the number of features has increased dramatically, and many of the restrictions previously maintained have also been eliminated. Or the sentence, it becomes very like a native:
Previously the largest hydrogen window became a centralized list of plug-ins on the left side of the homepage. This is actually the design of the original oxygen OS....In addition to the calendar, card coupons, and notes, the plug-in has added contacts, common applications, and plug-in locations. And length can be customized. This is a fairly easy-to-use setting, and almost no third-party apps have similar functionality.
The original 1/3 wallpaper that could not be displayed in full screen can now be displayed in full screen, but the icons are still 53 and there is no dock bar.
Desktop widget widget returns, and desktop plugins can be added anywhere.
Long press the desktop space to enter the desktop editing mode, you can replace the wallpaper, add widgets, icons organize, icon switching, etc. The entire UI design is very novel, but slightly suspecting, some of the slide operation.
Icons and names can be customized and support third-party icon packs, which are unique to some third-party desktops.
Increase the drop-down shortcuts on the desktop (pull up notification center, drop-down search).
Comes with app Â
Clock, Weather, Gallery
Calculator, Recorder, File Manager
Dialing: It is also very obvious that the original, the domestic ROM iconic Yellow Pages has been canceled, the use of the country's very low use of the collection feature does occupy a large tab page. It may be that oxygen OS is transported directly, and it is too late to change.
Clock: mainly UI and color simplification, this is more in line with the author's taste
Scratch note: At last the edit page has a title bar. Think of the previous note feature as a really simple one.
Almost unchanged: just changed the color of the gallery, put the list of details back to the calendar below, the camera, browser, etc., almost no change.
The backward part: The calculator and recorder canceled the previous styles and animations, but not as good as before.
summary 
Looking at the entire system, except for changes to the homepage customization project, hydrogen windows, and animations, which can be regarded as progress, the rest of the system has almost every degree of simplification or even regression. It is hoped that this is only due to the incompetence of the process of handling foreign oxygen OS.
It may indeed be transported. The problem of information system fluency and bugs is completely free of problems, and it can be used as a day-use system. But we have to say: The two old and new versions of the system are more like the collision between the hydrogen and oxygen OS, custom and native design ideas. Ironically, this represents the two extremes are actually hydrogen OS itself.
For one plus three users, unless you are particularly fond of the desktop and hydrogen windows of the new system, there is no need to upgrade hydrogen OS2.5, and it is even recommended to stay in this old version. After the new system is overkill, the function complement will be considered and upgraded. .
The gap between old and new systems, you can view the following direct comparison chart on the left is the original hydrogen OS2.0, is the right of all hydrogen OS 2.5:
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