My unlocked and Jailbroken iphone 3gs won't send pics?

I have an iphone 3gs and its unlocked and jailbroken but i can't send pictures.i've already changed the APN and Cydia is updated.i've looked on youtube, google, I've tryed EVERYTHING and still, i can't connect to the interent without Wi-Fi and it can't send pictures in a text (although i can send pictures using iMessage when connected to Wi-Fi) please help! I don't know what else do

You have to look into your plan and fix the info for the data setting. You can replace it by going to settings > general > network > cellular data network, the fill those in you can normally google the info you need.

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