Oppo A12 (CPH2083) Factory Reset and format User Data successfully done by Hydra Tool 1. Run MTK Tool and choose "Sosc"
2. Choose Brand and Module.
3. Go to "Service"--> "Tool" from Universal Option
4. Choose "Factory Reset / Format user data"
5. Choose "Safe Format Master Clear 1" drop down menu.
6. Connect device to computer using USB Data Cable.
7. Wait until the operation is completed
Screen Short: 
Logs: Quote:
=====================================
Searching for MTK Device...Found
Port Identification :Flashmode BROM
FriendlyName :MediaTek USB Port_V1633 (COM7)
Device :5&10dc9a0c&0&3
SymbolicName :\??\USB#VID_0E8D&PID_0003#5&10dc9a0c&0&3#{a5dcbf1 0-6530-11d2-901f-00c04fb951ed}
Driver Ver :01/22/2015,3.0.1504.0
Reading Device UniqueID, RAM and Flash Chip Info...
UNIQUE ID : F3146643216612E9E31F598A9249C862
ERAM Size : 0x0000000000080000 -512 KB
IRAM Size : 0x0000000080000000 -2 GB
eMMC BOOT1 : 0x0000000000400000 -4 MB
eMMC BOOT2 : 0x0000000000400000 -4 MB
eMMC RPMB : 0x0000000001000000 -16 MB
eMMC USER : 0x0000000747C00000 -29.121 GB
eMMC CID : 90014A68423861503E0333A5E0BB1713 - hB8aP>
Reading GPT-EMMC [0x00008000] 130 Items
Reading System Info
Vendor : OPPO
ID : PPR1.180610.011
SDK : 28
Release : 9
ABI : arm64-v8a
CPU abilist : arm64-v8a,armeabi-v7a,armeabi
Locale : en-US
Description : full_oppo6765_19451-user 9 PPR1.180610.011 eng.root.20210403.000938 release-keys
Security Patch : 2021-04-05
StorageType : mtp
Userdata State : Not Encrypted
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Operation : Safe Format Master Clear 1
Processing...
Safeformat Master Clear 1... Ok
Elapsed Time : 00:00:03
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BR
Dipendra Pathak