Both my wife and daughter have S5's, and neither sends photos with any reliability. About 10-15% of the time it works, the rest fail. I've looked for solutions online and nothing...lots of complaints!! One suggestion was to check the Access Point Names settings. I did this, and found them to be substantially different than the settings on my HTC One M8, which never has a problem. However, I am locked out from making changes (again, as opposed to the HTC One M8, which appears to let me make changes, haven't tried, since it's working fine).
So my teenage daughter is going nuts not being able to send photos via MMS. I think it is receiving them without problem, but the sending is awful. This is a basic function of the smart phone, and if not fixed, I would think would be grounds to get a no add'l cost replacement with say, the HTC like I have that seems to be working fine. Of note, they are both using the stock Verizon Messages+ app, not some third party app. I even tried downloading the third party app I prefer, but still did not work.
It is stuff like this that makes me wonder why I pay Verizon ~$300 per month for our family's service (though this issue seems to be affecting all carriers with the S5 Galaxy).
Help. Verizon?