OPPO F9 Pro (CPH 1823) Formatting selected partition successfully done by Hydra Tool
1. Run Hydra MTK Module.
2. Tick "Brand" and "Module".
3. Tick "Comport"
4. Select "Auto Broom Exploit", "Enable UBL Loader" and "Enable PrelDUMP"
5. Choose "PM" Tab
6. Choose "Flash Mode"
7. Click "Partitions"
8. Connect cellphone to the computer using USB data cable.
9. Wait until you see all information about Partition.
10. Now, choose the partition you wan to format, and click on "Erase"
11. Wait until the process is completed.
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Dipendra Pathak