My Nokia Lumia 900 can't receive or send pictures, how can I fix this?

I have a Nokia Lumia 900 and it won't send or receive pictures. Well only receive 2/10 pictures. It's really strange. Same sender sends 10 pictures but only two will show up and the others will have a "Media content in this message" and it's underlined. I hold it down but it only gives me the option of deleting the media content. This is very frustrating and if the issue continues, I will get rid of the phone and trade it in for a note. Or an iPhone in spite.

Seriously; How do I fix the problem. Is there an app I can download? A Update I'm missing?

Added (1). Okay! I'll try.

Try downloading this Nokia Network Setup app

I'm in the same situation, my Nokia Lumia 925 can't receive or send picture. Can you tell me how to solve the problem? Ps: it shows media content in this message after I send the message with picture

My lumia 900 doesn't recive pictures or sent… Why help me

I recently had a phone update on my Lumina phone, but now I'm not able to open pictures in my email. Does anyone have an idea. I was told it is a security setting, but can find the security setting on my phone.