I found in the code where it referenced the phone being used 

"<img class="bx-spl-image" src="<bx_image_url:spl-image-main.svg/>" />"

change the "spl-image-main.svg" to your desired photo. I found that uploading the photo in the same folder as the "main image" photo works. This all depends on what you are using as a host.