I also had the same the problem. After talking with a Verizon representative I found out that because the iPhone 5, 5s, & 5c all use 4G/LTE network when cellular data is turned on, that is the only way to send a photo message. However, if you are near wi-fi, you should be able to turn off cellular data and turn on iMessage to send photos. Now, as far as MMS and SMS is concerned, I was trying to send Group Messages with MMS turned on and Cellular off-it didn't work. I just now turned off MMS, iMessage, and Data, and it worked. I believe, if you're not concerned with data usage, you can just keep iMessage on and data on and everything should work no problem. But for someone like me that is data usage conscious, I turn off my data, iMessage, and just keep it on SMS, and only send photo messages when I have to. It's kind of a scam from the carriers which make you use data or wi-fi to send photo messages. That's just the world we live in. If I am wrong with that, then I would love to learn how to send photos without using LTE, but that's what I was told and has worked for me. In fact, Non iPhone users (older phones) use 3G network, therefore, they can send photos easier than 4G users (that is, if their data is turned off). Just to reiterate, you cannot receive photo messages without data or wi-fi/iMessage being turned on. And, you CAN send group messages if MMS is off and iMessage is off, or if data is on and iMessage is on. Hope that helps.