OPPO A55 4G | CPH2325 BOOT ERROR

[younespolina19]

Hello,
I'm trying to reset FRP for Oppo A55 4G CPH2325 using DFT Pro but the tool can't boot the phone in Preloader mode
and it throws this exception error : DAA_SIG_VERIFY_FAILED (99)
The device is on android 13, Security Patch : November 2025
I tried to find a DA that could work for the phone with no success
I'm wondering how is DFT running out updates which support new securities like android 15 and 16 but no being able to provide updates for this older android 13 with newer security patches

 

[loniryan]

hello, preloader operations not supported for newer and patched oppo devices.. for this model now you can connect in brom mode with test point

 

[saif2026]

Waiting for MTK port: 143
Driver Info: MediaTek Inc.
Driver version: 3.0.1504.0
Driver date: 1-22-2016
HW Chip: MT6765
HW version: ca00
SW version: 00
HW sub version: 8a00
SEC_CFG_SBC_EN: true
SEC_CFG_SLA_EN: false
SEC_CFG_DAA_EN: true
SEC_CFG_MEM_READ: true
SEC_CFG_MEM_WRITE: true
MEID: 0x956CCA3A02E6D8406E6CFB2B426ACD36
Brom exploit: OK
Preloader name: preloader_k65v1_64_bsp
Preloader version:
Send DA SYNC signal: OK
Setup device enviroment: OK
Read timeout in 20000ms (195)
Operation: failed 8.5.0.0

 

[inkesar]

Waiting for MTK port: 133

Driver Info: MediaTek Inc.

Driver version: 3.0.1504.0

Driver date: 1-22-2015

HW Chip: MT6833

HW version: ca00

SW version: 00

HW sub version: 8a00

SEC_CFG_SBC_EN: true

SEC_CFG_SLA_EN: false

SEC_CFG_DAA_EN: true

SEC_CFG_MEM_READ: true

SEC_CFG_MEM_WRITE: true

MEID: 0x7F6B8EE14FFB23A0894E4132871B20BE

Brom exploit: OK

Preloader name: preloader_oppo6833

Preloader version: 52

Send DA SYNC signal: OK

Setup device enviroment: OK

Receive DA SYNC signal: OK

USB_SPEED: HIGH-SPEED

Device mode: brom

Init EXT RAM: OK

Read timeout in 20000ms (195)

Operation: failed 8.9.2.0