The Android P Beta currently is not suited for general daily usage, and it's unstable for daily use. You will lose all files and data too at the same time, remember to do the necessary backups before flashing. Think twice before flashing to the Beta.
OPPO mentioned that to downgrade from Android P Beta to Color OS Android Oreo, you have to visit a OPPO Customer Service centre. It's unsure if it's applicable only to service centres located within China, or internationally.
R15 Pro - BT 5.0, IP67, slightly longer
R15 - BT 4.2, no IP rating
The purple colour is not very obvious, it's mostly black unless put under strong light.
The UI behaves very close to iOS, Apple users will find it very easy to use, even the same swipe-up gestures. Phone Manager manages the app permissions, cache, virus scan, etc. Android Calendar and no email app. OPPO's own photo and video app, preinstalled iReader, WPS Office, Compass, Theme Store, Color Browser.
Overall the R15 phone runs smoothly, doesn't feel like it's using mid-range processor. Battery life is same as most other phones, gets me through the work day, remains below 20% before I sleep.
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