I would like to kindly ask for your help regarding a strange problem with an Oppo smartphone.
1 week ago I bought a used Oppo Reno 5G smartphone for my son (11 years old) in an online marketplace here in the UK. He is more proactive than me with smartphones and he told me that the phone cannot be updated and that no reference application like Antutu or the 3D brand can be downloaded from Google Play. All other games or device information applications can be installed without any problem. The phone shows in the file manager 0 B unused space, but I can copy files, take photos and install games without any problem.
The phone was supposed to be an Oppo Reno 5G and looks identical to the Reno 10X. On the side of the body is written in lowercase letters "Model: CPH1919 Made in China" The imei reviewed online in a few places returns Oppo CPH1921.
Specifications as shown in all device information applications: Snapdragon 845, Andreno 640, 8GB ram, 256GB, 12Mp or 48Mp camera.
Model shown on PAFM00 phone. In the software update menu it is written "This is already the latest version ColorOS 6 PAFM00EE_11_A.01".
I have studied this problem in the last 2 days in my free time. Opb adb drivers installed and exchanged with adb android drivers. Here is the result.
With the phone off, when I press the volume down button and the power buttons, an image flashes for a quarter of a second with a flashing head icon with headphones and some Chinese text that I translated: "You have entered Fastboot Press and hold the power button for 6 ~ 10 seconds or reinstall the battery and exit. " While holding down these buttons, it will flash again and again every 3 seconds. If I release them, the phone restarts and the Oppo logo appears returning to normal.
Using ADB tools (different version, Studio), only "adb devices" returns the model number and "device" later. All other adb commands (adb reboot, usb, reboot-bootloader and adb reboot recovery, etc., I tried most of them) returned "error: closed", for "fast boot devices" nothing is shown , "quick start unlock" I get "waiting for the device".
I tried to install stock Rom. When using the Volume Up and Power on buttons with QPST, I sometimes get Qualcomm and sometimes "Q / QCP-XXX (Sahara Download)", because the phone restarts in some way just after releasing these buttons and losing the connection .
Any advice to update this device and have it correctly display the correct model will be amazing.
About phone, quick start, specifications
Specifications 2, Specifications 3, Benchmark