MMS Download button only

[anon(6078578)]

I setup my Lumia 640 for my wife so she could try the Windows 10 Mobile I have running on it. This allowed me to put her Windows 8.1 Lumia 640 aside just in case things went pear shaped. Have already run into a problem. Whenever I send her MMS files all she gets is a download button and clicking on it does nothing. I am hoping there is a setting somewhere I haven't set up correctly? It's on T-Mobile.

 

[anon(6078578)]

Never mind. Jumped the Gun and unable to delete this post. There was no MMS APN. I forgot that the Windows 10 is installed directly from Microsoft so the MMS is not setup by default like it normally would be, although it set up other T-Mobile specific settings such as voicemail etc.