Sprint Ativ S Neo with W8.1 with most current phone update.
I've had this problem not only with this Neo but also when I had the Arrive. I will get an MMS (not a group text, but an MMS with a media attachment) and it won't automatically download the media, even though my Messaging Settings have the auto-download set to "On". When I tap "Get media content now" it will linger on "Getting media content..." for a few seconds then go back to "Get media content now." I tap and hold, but not error appears in the pop-up box. This mainly happens on cell data and usually works when connected to wifi.
Solutions I have tried:
Turn data off for a minutes then turn back on.
Set to airplane mode, then turn it off. <-- This has worked in the past sometimes.
Set SIM settings to CDMA.
Remove SIM card and soft reset. Then reinsert.
For well over a year by this point. It will come and go in stretches. Sometimes someone will send a MMS and I won't get it for almost 12 hours!
There seems to be no rhyme or reason as to why. Yes I still have this problem. I have an MMS right now that refuses to pull down its media contents, even after all the above steps.
I've seen the same thing on mine. It's not a fairly often occurrence, but it does happen. As mentioned, sometimes it will be hours later before it will actually download. I've never had it not download, but just delayed by a few hours.