I got a Samsung Galaxy Core and I am having trouble receiving picture messages. I do not have data. The phone I had prior to this one was a Samsung Galaxy SII and it also had no data. However, on my old phone when someone would send me a picture message it would simply tell me to turn on my data and then i could click download on the message and receive the picture. Now when someone sends me a picture message, it doesn't even tell me who has sent it it just says Can't retrieve MMS, Check Settings > MMS Settings > APN. I just want to be able to receive the messages as I had been on my old phone, by simply turning my data on for a moment.