You can enable MMS on your iPhone to send multimedia messages without using iMessage. Here's how to make sure it's enabled.
It's easy to enable iMessage on an iPhone to send messages over cellular data or Wi-Fi with other iPhones, or over Wi-Fi with iPads or Mac computers.
With the Messages app, you can send and receive text messages, photos, and videos on your iPhone. But while Messages works great for Apple users (thanks to iMessage), if you're texting someone on ...