[Android Q&A, Help & Troubleshooting] Placyd:
Good day! :D:)

It's my first post in here. Enjoying my stay in the website.

Please excuse my grammar as English is not my first and native language, I learned it from my colleauges.

I am gonna be honest with my questions and specs

sorry if i didn't state the phone model in the title of this thread, I really need attention po.

I will also upload some images for reference and better understanding.

I wonder what's the problem and the solution for the ADB command line in Windows 7 while trying to fastboot my Oppo A5s CPH1909.

Someone already talked about the device in another thread yet there's no such solution and I'm not yet satisfied with the answers (which didn't help at all) which is here: https://xdaforums.com/android/help/oppo-a5s-update-file-boot-img-patch-t4025231

According to an App from Google Play called "CPU-Z" the specifications of this cellular is the following (i'll only include stuff that are important):

SOC-

Cores: 8

Architecture: 8x ARM Cortex-A53 @2.30 GHz

Revision: r0p4

Clock Speed: 900 MHz - 2.30 GHz

GPU Vendor: Imagination Technologies

GPU Renderer: PowerVR Rouge GE8320

scaling governor: unknown

Device-

Model: CPH1909

Manufacturer: OPPO

Board: unknown

Hardware: mt6765 (mt in mt6765 means Mediatek v6765)

System -

Android Version: 8.1.0

API Level: 27

Security Patch level: 2020-06-05

Bootloader: unknown

Build ID: CPH1909EX_11_A.38

Java VM: ART 2.1.0

OpenGL ES: 3.2

Kernel architecture: aarch64

Kernel Version: 4.9.77+ (1591031854)

Root Access: No.

Google Play Service: 20.24.14 (040406-319035315)

Simplified specifications (from https://www.oppo.com/ph/smartphone-a5s/specs/)

Dimensions/Weight

Height: 15.59cm / 155.9mm

Width: 7.54cm / 75.4mm

Thickness: 0.82cm / 8.2mm

Weight: 170g

Basic Parameters

Color: Black

Operating System: ColorOS 5.2, based on Android 8.1

Processor: MTK MT6765

GPU: IMG GE8320

Battery: 4230mAh

RAM: 3GB

Storage: 32GB

Display

Size: 15.8cm(6.2'')

Touchscreen: Multi-touch, Capacitive Screen (10 points)

Resolution: HD + (1520 by 720 pixels)

Colors: 16.7 million colors

Type: In-Cell

Camera

Rear Sensor: 13MP & 2MP

Front Sensor: 8-megapixel

Aperture: Rear: f/2.2 + f/2.4

Front: f/2.0

Connectivity

Frequencies:

GSM: 850/900/1800/1900MHz

WCDMA: Bands 1/5/8

LTE FDD: Bands 1/3/5/7/8/20/28

LTE TDD: Bands 38/40/41

SIM Card Type: Dual Nano-SIM + MicroSD Card

GPS: GPS/A-GPS/GLONASS/Beidou/Galileo

Bluetooth: 4.2

WLAN Function: WLAN 2.4G / WLAN 5G

OTG: Support

NFC: No

Sensors

E-Compass

Light Sensor

Proximity Sensor

G-Sensor/Acceleration Sensor

In the Box (unnecessary)

OPPO A5s *1

Adapter *1

Micro USB Cable *1

Important Info. Booklet with Warranty Card *1

Quick Start Guide *1

SIM Card Ejector *1

Film *1

Case *1

Product ID

Product ID: CPH1909

===========================================================================================

All I wanted to do is to unlock it's bootloader and try to wait for a custom recovery images for it to root it.

MY PROCEDURE:

I connect the phone with the USB connector it comes with the box

IN THE PHONE:

[IMG="1"]https://imgur.com/a/fQdUuUU[/IMG]

[IMG="2"]https://imgur.com/a/epE7RDE[/IMG]

[IMG="3"]https://imgur.com/a/v3vndPO[/IMG]

I already enabled Developer options in the smartphone

I already enabled OEM Unlock

I already enabled Enable USB Debugging

IN THE PC:

[IMG="adb"]https://imgur.com/a/o2oLbPT[/IMG]

[IMG="devices"]https://imgur.com/D1UU6uW[/IMG]

[IMG="adb2"]https://imgur.com/a/44Ei97P[/IMG]

[IMG="WAITING"]https://imgur.com/a/1B6rhdT[/IMG]

[IMG="helpp"]https://imgur.com/a/fnXyJRs[/IMG]

Everytime I write "adb reboot-bootloader" it just turns off and it indicates the battery that is charging which is over 60%, nothing else.

I rebooted the device and powered it on, enabled Developers options, turned on the option to unlock "OEM Unlock (allow unlocking of bootloader)"

When I type "fastboot devices" it does nothing.

then I entered "fastboot oem unlock" or "fastboot device -s (serial number)" it just tells: <waiting for any devices> or <waiting for device>

I searched for a solution for the <waiting for device> problem and it tells me to install USB drivers of Mediatek and Google

After I installed all the drivers. the Android ADB Interface, the Android Bootloader Interface, the Android Composite ADB Interface all has a yellow exclamation marks on their icons in Device Manager then when I click them the Device Status of all of them all says "This Device cannot start (Code 10)"

Device Manager do tell that I have a working Oppo A5s that runs well, it doesn't tell me that it is only an Android Device with an icon of a yellow exclamation mark.

I already installed all the necessary drivers the websites I searched for told me but no luck it still indicated <waiting for device> after I input "fastboot oem unlock"

I think the problem could be my PC which aged well. Here are the specs for it too:

OS: Microsoft Windows 7 Ultimate 64-bit

Motherboard: ASUS P5G41C-M LX, LGA 775/Socket T

CPU: Intel Pentium(R) Dual-Core CPU E5800 [MENTION=1204570]3.2[/MENTION]0 GHz

GPU: AMD Radeon HD 5450

Thank you for those who will help me find the solution to unlock the bootloader of my Oppo A5s CHP1909 Android Phone. ;);)