I just got the Samsung Galaxy Legend and was trying to send a picture on it. I have the $45 smartphone prepaid plan. The unlimited text, talk, and then 500mb of data. I had the wifi turned on and it wouldn't let me send a picture in a text message on wifi. So I took off wifi and it sent it through with data. Do I have to do this every time to send a picture? Why can't it send with wifi on? How much data will it use out of the 500mb if I send a picture or two every day for the month? Sorry for so many questions! Thanks!