Iphone 4 can't send or receive pictures?

I have an unlocked tmobile iphone 4, i can't send or receive pictures unless the person has an iphone as well. I just got an iphone so i'm not sure if this is something that was supposed to happen with the iphone or something is wrong with mine, thanks!

One of the problems with using an iPhone on T-Mobile is it can't reliably send MMS messages.

They can usually be sent with few problems as an e-mail attachment.

You have to be using 3g, 4g, LTE in order to send pics or vids, you can't send them over Wi-Fi!

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