REFERENCE Oppo a5s CPH1909 password and frp done by hydraMTK

[erwin_tech]

Open HydraMTK
1. select brand
2. select model
3. Select Read System info
4. Click Boot/info
-hold Vol (+/-)
-salpak USB
5. Ultra Power
6. select erase userdata
7. check auto reboot
8. execute