Anyway, I partake in several group text messages daily. Between class projects, work, and friends, I usually have a good 3-4 group messages going simultaneously. So I've had the luxury of dealing with this issue first hand. This may have something to do with the fact I have very poor service at my house but I don't think it should be impacting my use of group MMS that much.
I own a Nexus 5 on T-Mobile and use Google Hangouts.
Now, for the issue... It seems about every 5-6 MMS messages, one will appear in the respondents thread rather then the group message itself. It will let me know that there is a MMS ready to be downloaded. So I then proceed to click and download the message. It's very intermittent but on occasions, it will fail to download the message all together. In which case, I will never see that text the person sent unless I ask them specifically what was said. It's really quite annoying...
Granted, 90% of the time, all of the respondents are using an iPhone. And that's where my question comes in... Some have T-Mobile and never ever experience this problem on their iPhone's. My friend who also owns a Nexus 5 and is also part of the group messages says that he has experienced what I've been going through...
I've tried changing my APN settings with no avail. Matter of fact, I changed my APN settings and started getting group messages in this format: <No Subject> What's up guys?
To me, this is absolutely ridiculous. The technology has been around for awhile, so it's hard to see why it hasn't been perfected yet in Android. The other day, I was in a group MMS with 2 other friends. Both of them where chatting but I was only seeing messages from one person... As if he was talking to himself. They both have iPhones. So not only are they not downloading successfully but now I have no way of seeing if anyone even sent anything at all.
I remember being on Verizon with my Droid RAZR and also experienced this same exact issue with group MMS.