Both my Girlfriend and I are Verizon customers.
She has an iPhone 4S, and I have a Android Razor M.
The last two weeks, whenever I send her a picture via a text message, she sees the thumbnail, but is unable to expand it. I get her pictures fine, and they load fine, full size and all. She hasn't done any upgrades to the phone or any real changes.
on my iphone I simply long press the picture in the mms and save it. The size of the photo is never full size. but in photo gallery it is larger.
Have her try that.