How to send and receive picture messages on T Mobile (UK)?

I've just got an iPhone 5s and I can send and receive photos on iMessage, but not on MMS. I can't send them at all and when I receive them, it gives me a website and password to retrieve it, instead of it just appearing on the screen. MMS and data are both switched on, so I don't know what's wrong.

That will happen when your MMS settings arent set up. Yes, your MMS and Data might be switched on but that doenst mean your MMS settings are correct. In most cases, you can have T Mobile send the settings to your phone directly.
Alternatively, text FIXME to 150 and you will receive settings via text.

  • Why does my iPhone 3gs lag to send and receive messages? I have an 8GB iPhone 3GS. It won't send messages. It can take from 3 minutes to 2 hours to send a message and same with receiving a message. I'm using iMessage. It is updated to the 6.0.1. I don't know how to fix this problem because it stops me from communicating with people.
  • Why can't I send or receive picture messages? I have a unlocked iPhone 3G with t mobile it won't send or receive picture messages I had the same sim card in my other phone and it sent and received them so it has to be this Iphone how do I fix it or can I?
  • My iPhone isn't letting me send/receive picture messages? I don't know what generation it is but it's the one without the front camera only the back. And ever time I send a pic a little red exclamation mark comes out
  • My iPhone 4 receives and sends text messages but can't send or receive photos? Barely bought a new iPhone 4, put my sim card into it and the iphone won't let me receive or send picture texts. I can send message texts and receive them, but not picture ones. It keeps giving me an error (red exclamation point) on by my picture. Tried all your suggestions. Still doesn't work and yes I can attach to emails and stuff but just can't text photos.