=> First Tried Disable Locks feature Logs show Disabled Android Locks Done but lock still was Same.
Device : Oppo A57
Operation : Disable Locks
Checking for existing devices...Not Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM33)
Driver Info : Qualcomm Incorporated, qu_usb_serial.sys, 2.1.2.0
Connecting to phone...OK
Waiting for response...OK
Init Handshake Sequence...OK
Hardware ID : E1B00600 [8937] 00000000
OPK_DATA : 2729EC539F0C70FA21C67CD1B8C249998B3D85E480BE31DB27 277ABB926ECC2D
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8937_009]...Done
Executing Loader...OK
Detecting Chip Type...OK
Hardware : 8937, eMMC, 32 GB
LU Count : 1 [0x03A3E000]
WARNING! High Speed Driver is not installed.
Please install driver from QcFire\Drivers folder using Device Manager.
Payload Info : In: 65536 [4096], Out: 1048576, Sector Size: 512
Reading Partition Table...OK
Reading Device Information...OK
Device : OPPO CPH1701 [msm8937] [CPH1701]
Brand : OPPO
Prod.Name : CPH1701
Software : CPH1701EX_11_A.34_180806, eng.root.20180806.181819 [Mon Aug 6 18:20:59 CST 2018]
Android Ver. : 6.0.1
Patch Level : 2018-05-05
USERDATA : Encrypted
Disabling Android Locks...Done
Operation Finished.
QcFire Ver. 6.4
=> Then finally have to used Factory FS option but i was lucky because all user data were still available in internal storage.
Device : Oppo A57
Operation : Format FS
Checking for existing devices...Not Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM33)
Driver Info : Qualcomm Incorporated, qu_usb_serial.sys, 2.1.2.0
Connecting to phone...OK
Waiting for response...Ignored
Init Handshake Sequence...OK
Hardware ID : E1B00600 [8937] 00000000
OPK_DATA : 2729EC539F0C70FA21C67CD1B8C249998B3D85E480BE31DB27 277ABB926ECC2D
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8937_009]...Done
Executing Loader...OK
Detecting Chip Type...OK
Hardware : 8937, eMMC, 32 GB
LU Count : 1 [0x03A3E000]
WARNING! High Speed Driver is not installed.
Please install driver from QcFire\Drivers folder using Device Manager.
Payload Info : In: 65536 [4096], Out: 1048576, Sector Size: 512
Reading Partition Table...OK
Reading Device Information...OK
Device : OPPO CPH1701 [msm8937] [CPH1701]
Brand : OPPO
Prod.Name : CPH1701
Software : CPH1701EX_11_A.34_180806, eng.root.20180806.181819 [Mon Aug 6 18:20:59 CST 2018]
Android Ver. : 6.0.1
Patch Level : 2018-05-05
Formatting userdata [SafeMode]...Done
Resetting FRP Lock......Done
Operation Finished.
QcFire Ver. 6.4