A:Answer This answer assumes that you're taking pictures with your smartphone; if you're using a camera you can still do it but you have to transfer the picture from your camera to your phone.
If your phone is connected to the WiFi network that your printer is connected to, you can use the Epson iPrint app on your phone to print photos. If you're outside WiFi range, the ET-2800 is capable of printing photos that you send as attachments to emails to the printer, but you must set up the printer to use this feature - see https://files.support.epson.com/docid/cpd6/cpd60271/index.html?page=source%2Fproduct_info%2Fepson_connect%2Ftasks%2Fepson_email_print_panel.html for information on how to do this.