I was using my GoPhone card in my old 3GS just fine, and I had no trouble sending pictures. I then bought a 4Gm which required me to have my sim card cut in size so it would fit in the 4G. Everything has been working fine on it, but I can't send or receive pictures for some reason. I've tried changing my apn to wap.cingular and the PAYG one, but nothing works.
>>> Why won't my iPhone send pictures? - 1