Yes, but you cannot do this via OTA. You must use the PC Flash Tool (SP Flash Tool) with the Android 9 OFP file. Downgrading requires a full data wipe and may cause hardware compatibility issues if the bootloader version differs.
| Region | Build Number | Android | ColorOS | Security Patch | |---------|--------------|---------|---------|----------------| | India | CPH1835EX_11_C.20 | 10 | 11 | 2022-08-05 | | Global | CPH1835_11_C.19 | 10 | 11 | 2022-06-05 | | SEA | CPH1835_11_C.20 | 10 | 11 | 2022-08-05 | Firmware OPPO R15x
OPPO R15x is a Smartphone powered by ColorOS 5.2 based on Android 8.1 Oreo and 16MP + 2MP dual rear cameras with LED flash. FoneArena.com Oppo R15x - Full phone specifications - GSMArena.com Yes, but you cannot do this via OTA
Based on historical user reports and community forums (XDA, OPPO Community), the R15x firmware exhibited specific issues. | Region | Build Number | Android |
: Originally shipped with ColorOS 5.2 (Android 8.1 Oreo), with some updates reaching ColorOS 6.0 (Android 9.0 Pie). Battery : 3600 mAh Li-Ion. Why You Might Need Firmware for OPPO R15x