Unlock Screen Patterns and FRP on Oppo A5S using MRT Keys without Direct ISP

#1
The more recent Android security patch level on Oppo phones, the more difficult it is to flash. Fortunately, the MRT Keys software makes it easy to factory reset Oppo A5S without having to search for a pinout and do a Direct ISP.

How to Check About Phones Through Emergency Call
  1. Turn on the device.
  2. On the password input screen, tap Emergency Call.
  3. Dial *#899# -> Software Version -> Model / OTA Version. The plan is to find out the Model dan Android Firmware Version installed on the phone. The Oppo A5S that I maintain has been using the firmware version CPH1909EX 11 A.26 Android 8.1.0 and security patch level 5 August 2019.
Factory Reset Using the MRT Dongle Through Meta Mode
  1. Make sure you have MRT Dongle and the lastest MRT Key software. In this case, I am using MRT Key software version V3.33.
  2. Install Mediatek Drivers on your Windows PC.
  3. In the MRT Keys interface, select the Oppo menu tab.
  4. Mobile Options select the Oppo A5S Model and Auto Port.
  5. Press the Start button.
  6. Turn off the phone.
  7. Connect the phone to the PC while pressing the Volume Down button.
  8. The phone will turn on displaying Meta Mode text on the bottom left the screen and didn't panic when the screen is green.
  9. MRT Key software will try to recognize your device to do a Factory Reset via Meta Mode, wait a few seconds until the reset process is complete.
  10. After the reset process is complete, restart the device.
Code:
Disconnect Mobile...
    re-input Mobile Battery...
    then connect usb to computer....
    Make Sure your Mobie have power...
>>> Searching Mobile Com Port...
    Get Mobile Port:  COM29
>>> Driver Identifying name:
    MediaTek USB Port
>>> ÊÖ»úÁ¬½ÓÕý³£...
    CPU_NAME: MT6765
>>> Reading Mobile Hardware info...Success
    HW_Inf:  8A00    SW_Inf:  CA00
>>> Searching Mobile Com Port...
    Get Mobile Port: COM16
>>> try into Meta Mode...success
    Reading Mobile Base Info...
    CPU_TYPE:mt6765,S01
    Bulid_Time:Sun Aug 11 04:52:20 CST 2019
    Base_Ver:CPH1909_11_A.26_190811_34570289    Soft_Ver:    factory reseting...
    rebooting...
    all is done!!!
Bypass FRP Oppo A5S Via Dial.
After successfully removing the screen lock, the next step is to bypass the Factory Reset Protection (FRP) feature on Oppo A5S using Dial-Up.
Turn on the Phone.
  1. On the Select Language screen, tap Emergency Call.
  2. Dial *#813#.
Update Oppo A5S Firmware Through Recovery Mode
When you have finished doing a Direct ISP or Factory Reset using the MRT Keys, and the result is the phone only displays the logo. You can reinstall the firmware via Recovery Mode.
  1. Download the OTA Firmware Oppo A5S and copy it to the SD Card.
  2. Turn off the phone.
  3. Insert the SD Card into the cellphone.
  4. Press the Power and Volume Down buttons until the phone lights up, and the Recovery Mode text appears in the lower-left corner.
  5. Choose English or other languages that you can understand.
  6. Select Install from device storage.
  7. Select SD Card.
  8. Select the firmware package and install it.
 
Last edited:
#2
MRT Keys v3.33 has factory reset successfully on the Oppo A5S with the firmware version CPH1909_11_A.28_190916_34570289.

Code:
    Disconnect Mobile...
    re-input Mobile Battery...
    then connect usb to computer....
    Make Sure your Mobie have power...
>>> Searching Mobile Com Port...
    Get Mobile Port:  COM29
>>> Driver Identifying name:
    MediaTek USB Port
>>> ÊÖ»úÁ¬½ÓÕý³£...
    CPU_NAME: MT6765
>>> Reading Mobile Hardware info...Success
    HW_Inf:  8A00    SW_Inf:  CA00
>>> Searching Mobile Com Port...
    Get Mobile Port: COM22
>>> try into Meta Mode...success
    Reading Mobile Base Info...
    CPU_TYPE:mt6765,S01
    Bulid_Time:Mon Sep 16 23:18:24 CST 2019
    Base_Ver:CPH1909_11_A.28_190916_34570289    Soft_Ver:    factory reseting...
    rebooting...
    all is done!!!
oppo-a5s-cph1909.jpg