Picture converted to very low quality while sending MMS I've HTC Desire 2.3.3 . Recently I took one photo from stock camera app and clicked Menu -> Share -> MMS.

My picture was automatically converted to 7KB sized file. No doubt the picture lost all its quality.

I was wondering from where I can control this setting, so that I myself can define what size/quality should the MMS picture be. The only thing I found in MMS setting was maximum size of the message.
My understanding is that its operator defined per all the discussion I have seen around this, and does seem to be correct when I consider that on TMobile in the UK I can send a picture file around 258KB - with 640*480 dimension JPEG without any issue - which is plenty big enough for phones.

I have checked to see if its working on a standard algorithm by using a much smaller picture file and size, however it still created a MMS around 200KB (around half the file size of the original picture), suggestion the algorithm is dynamic when it compresses the photo. Further suggesting it really is operator defined.