Still same thumbnail size Frals.
Unfortunately, in situations like this, it can be a real trial-and-error experience to figure out what values make a difference. Note that some MMSCs may only pick up dynamic changes to your configuration when you send a message, not when you receive one. Others may pick up the change when you receive a message, but update their internal information for the next time that someone sends you a message. It is also possible that it may take several minutes for the MMSC to update its internal database after you try a different setting. So whenever you change this setting, try having the modem send an MMS message to itself ... wait a couple of minutes ... try again ... wait ... then try again a third time to see if anything has changed.