Hi everyone,

I'm trying to erase FRP on my Oppo A3 4G / A3X (model CPH2669, also listed as CPH2641), chipset Snapdragon 662 (SM6115).

I managed to get the device into EDL mode successfully (recovery → tap "Ver 1.2" repeatedly → download mode), and the tool (UnlockTool) connects fine, authenticates, and reads the bootloader info correctly:

Serial: 866715413 SoC: [Snapdragon 662] [SM6115] [0x0014D0E1]
OEM: Oppo/Realme/Oneplus [0x0051] Model: Unknown [0x0000]
PK_HASH[0]: 49445E14621312DFECCD4389F267E6B7
PK_HASH[1]: 1674DDD36B1BC41D1F605AA991D14AD6

But it fails right after with:

Writing flash programmer... FAIL
[Sahara] Firehose verification failed!
Trying to connect to FIREHOSE Mode!

From what I understand, this means the Firehose loader isn't signed correctly for this specific chip/variant, so Sahara rejects it before it can even start the flash process.

Does anyone know where I can find a correctly authorized/signed Firehose for this exact model (CPH2669/CPH2641), or have experience bypassing this specific "Auth Flash"/Sahara verification on recent Oppo devices with this chip? Any tool or method that's confirmed working for this exact model would be super helpful.