Why can't I send photos on my iphone 4s since ios 7?

Ever since I upgraded to ios 7 I can't send photos. I can send regular texts but not photos. I try to send a photo with iMessage using 4g and Wi-Fi and it don't work. I tried sending photos with MMS Messaging and that doesn't work too. What can I do to fix this and is this happening to anyone else?

Bro, I have the same EXACT problem. I just read somewhere that they're working to improve that.

Format is not compatible

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