Flash Guide How to Flash a ROM to Your Android Phone
These are the instructions to download Flash or install Stock Firmware (ROM) on Cat B15Q (Original firmware) , If you searching for the Cat B15Q Stock ROM then you are at the right place. Here i will guide you to install official stock Rom on Cat B15Q , Here you can download the Official Cat B15Q Stock Firmware ROM (flash file) on your Computer
Download Cat B15Q Stock Rom (Original firmware)
Requirements: Your Cat B15Q Device should have at least 40-50 percent of battery to perform the Flashing Process.
Flash File Name: Cat_B15Q_GENE_DS_1.022.000_MT6582-[flash-file.net].zip
Flash File Size: 736 MB
Flash Tool Link: SP Flash Tool For Windows | SP Flash Tool For linux
How to Flash Stock Firmware ROM on Cat B15Q
To install the Stock Firmware on Cat B15Q , Please follow the guide and download the Rom . This guide is for How to Install Stock ROM on Cat B15Q .
STEP 1: Download and Install the Cat B15Q USB Driver on your computer. In case you have already installed them, you can skip this step.
STEP 2: Switch Off your Cat B15Q 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 Cat B15Q to your system using the USB cable and , press any button other than power button so that your system will detect your Cat B15Q 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 Cat B15Q and switch it ON.
Congratulations, Now you have successfully flashed the stock firmware on your Cat B15Q using SP Flash Tool.
Keep in mind:
[*] Cat B15Q 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 Cat B15Q Stock Firmware as because during the flashing process your personal data will be removed permanently.
[*] Broken link Report here.
[*] ROOT Cat B15Q:If you would like to know how to root your Cat B15Q android device, drop a comment below. We will share the tutorial for your device as quickly as possible .