I have tried sending a pic through MMS with HDR ON with the "Option" of saving the original and the HDR pic at the same time.
I tried sending the Original one (1.74Mb) and the HDR (2.05MB). I was Successful in sending the Original one but not the HDR one.
To make sure this was the issue I tried once again by snapping another pic. Original (2.02MB) and the HDR (2.29MB). I tried sending the Original first but I had no luck and same result with the HDR one.
I tried sending the Original picture (1.74MB) again but it did not go through!