If you upgrade firmware on your Oppo devices, then download Oppo Flash Tool or Oppo Smart Phones tools software. With a flash tool, you can unbrick a phone, repair its software issues, break the lock, flash the ROM, hard reset, etc.The following tutorial shows all method of master reset OPPO A5. Here is an easy solution to get data back from your locked phone. Oppo Reno 6 Pro (Auth Bypass) (Without Credit) (Without Box).That’s how you Unlock FRP Lock on your Oppo mobile via the OPPO FRP bypass Tool. Solution 3: Hard Reset to Unlock Oppo A3s Pattern Lock. Additionally, It also helps to enable Diag, Unlock Secrecy lock, Enable ADB, etc. The following tutorial shows all method of master reset OPPO A71. Click on the Download (in flash tool) button to start the flashing process. Next, select option : “wipe data / factory reset” using Volume Down, and Power button to confirm operation. Oppo hard reset tool Here I share complete information How to Use Oppo Flash Tool to flash an Oppo phone.