If the dialer code brings you to a menu asking for "USB Configuration" or "Fastboot," select it. If nothing happens, your carrier or ROM has blocked this method—use Method 1 or 2 instead.
: Your phone will automatically restart and boot directly into Fastboot Mode. Troubleshooting: "Fastboot Isn't Working!" Some users report that their simply reboots when trying to enter Fastboot . This is often due to locked bootloaders how+to+open+fastboot+mode+on+oppo+a74+best
What Is Android Fastboot Mode and How Does It Work? - miniOrange If the dialer code brings you to a
: Use a high-quality USB-C cable to connect your Oppo A74 to your computer. " select it. If nothing happens