So, I bought the mobile subject, it is cheap and I needed a new one. I must confess, I have done a great catch. Trots the negative reviews (see Troubleshooting), I honestly can not understand. After writing the MMS works great, it makes great photos, send also the matter of the transmission report. So for me is only transmitted when the SMS was actually transmitted, namely an exclamation mark for transmitting and a minus sign for not transferring, cases, that his phone has. By the way, I have no contract, and everything works anyway !!!