Yes! People can reply with an image or other MMS supported file type, and you'll see it appear in your inbox the same as a regular SMS message.
File Size Matters Here
There are file size limitations built into the carriers' and texting providers' technology that limits what is able to be sent via text. Unfortunately, there is nothing on our end that can be done if someone sends you an oversized MMS message, but we will make sure that your outgoing MMS are the right size to go through as intended.