Flash Guide How to Flash a ROM to Your Android Phone
These are the instructions to download Flash or install Stock Firmware (ROM) on Circle Tech S12 (Original firmware) , If you searching for the Circle Tech S12 Stock ROM then you are at the right place. Here i will guide you to install official stock Rom on Circle Tech S12 , Here you can download the Official Circle Tech S12Stock Firmware ROM (flash file) on your Computer .
DownloadCircle Tech S12 Stock Rom (Original firmware)
Requirements: Your Circle Tech S12 Device should have at least 40-50 percent of battery to perform the Flashing Process.
Flash File Name: Circle_Tech_S12_MT6572_07032016-[flash-file.net].zip
Flash File Size: 309 MB
How to Flash Stock Firmware ROM on Circle Tech S12
To install the Stock Firmware on Circle Tech S12 Stock , Please follow the guide and download the Rom . This guide is for How to Install Stock ROM on Circle Tech S12 .
STEP 1: Download and Install the Circle Tech S12 USB Driver on your computer. In case you have already installed them, you can skip this step.
STEP 2: Switch Off your Circle Tech S12 device .
STEP 3: After downloading Stock Firmware , extract the zip file on your system.
STEP 4: Download the SP Flash Tool on your system and extract the downloaded zip file on your system. After that you can see the following files listed.
STEP 5: Form the files listed run the Flash_tool.exe file.
STEP 6: Once the SP Flash tool is started, click on the Scatter-Loading button located in the right side. 
STEP 7: Now locate the scatter file in your stock ROM. It is generally located in the bin/ directory. STEP 8: Now click the Download button to start the downloading process. 
STEP 9: After completed all the above steps, connect your Circle Tech S12 to your system using the USB cable and , press any button other than power button so that your system will detect your Circle Tech S12 Device. You can use volume buttons. 
Step 10: Once the flashing process is completed, a green ring will appear on your system. Now disconnect your Circle Tech S12 and switch it ON.
Congratulations, Now you have successfully flashed the stock firmware on your Circle Tech S12 using SP Flash Tool.
Keep in mind:
[*] Circle Tech S12 Flash Tool: If you need to download the latest version of SP Flash Tool, then head over to SP Flash Tool For Windows or SP Flash Tool For linux .
[*] Backup Please: Take a backup of your important data before Flashing Circle Tech S12 Stock Firmware as because during the flashing process your personal data will be removed permanently.
[*] Caution]: On Mediatek powered devices, We do NOT recommend to Flash the Preloader.bin. As it may brick the device, therefore we recommend you to Untick the Preloader while Flashing the firmware.
[*] Broken link Report here.
[*] ROOT Circle Tech S12:If you would like to know how to root your Circle Tech S12 android device, drop a comment below. We will share the tutorial for your device as quickly as possible .