HawkMan, on 24 December 2012 - 23:28, said:
MMS' works in the way that the phone gets an SMS notifying it you have an MMS. depending on the phone/software, when data is off it will either notify you you have an MMS to download and say you can't download it, or give you one of those web links to download the MMS in a browser.
So as long as your notifications are correctly set up, you should get a notification of having an MMS waiting for you. being on WiFI or not won't affect the MMS at all since it doesn't use WiFi at all for MMS'. they are only downloaded through data.
cybertimber2008, on 24 December 2012 - 23:29, said:
Are you disabling mobile data? As long as your 3G is on (you can disable 4G/LTE) it should download a MMS.
SMS will work as long as your cellular connection is on (so it will work on roaming or with data disabled), but MMS needs a cellular data connection. MMS doesn't work on wifi-only (without other apps).
When you have both wifi and mobile data on, it should switch on mobile long enough to get the MMS. I do remember the HTC Hero had a bug where it didn't, and it was later fixed in a OTA. Haven't heard of that on a GS3 though...
Ok, so when I have mobile data AND wifi on, everything works fine and it switches to mobile data to download the message and i get a notification and its like a normal text, i do not need to go to the message and hit download because it automatically downloads it. BUT If i have mobile data off and ONLY wifi it does not give me a notification that I have a MMS message waiting for me that i need to download, so i do NOT know that I need to turn on mobile data, go to the message app, click the thread with a new message, and hit download so I can see the message.