Thanks Daniel!
I'm already evaluating some of what you said.
(I'm also studdying how to connect a telit gsm862-pcs directly with a camera, like you said).
Nokia s60 phones are python programmable phones so I'm thinking to use just python to do the control job but the solution need to be cheap (100-150$) and there will be NO power supply where the phone will work. Because of this I was asking for an arduino based solution that would consume pretty nothing and that activate the gsm module just when needed (once a month). I discovered an off-line mode on series 60 nokia phones to avoid network registering to save power but again I dunno how long the battery will go I have to experiment It.
I don't need a big resolution nor a big image format. It can be also black and white and the photo don't have to be stored. Just a few kb image for me will be good !
Maybe I don't understand when you say about throughput, can you speak me better?