I've been having all sorts of problems with Group Messaging for the last 2 weeks on my HTC One. Things always worked fine until recently. It's a thread with 4 people that all have IPhones. Sometimes my texts go through and they show up on their phone's as just a blank message. It's really frustrating because I have no way of knowing when it happens, and they are getting sick of telling me so I'm just in the dark. Sometimes their messages to me come through and get stuck in the individual thread with a box that just has a thing to click to download the message, sometimes it goes through and then moves them to the group thread, sometimes they are just unable to be downloaded.
Don't know why this is a disaster all of a sudden. I sold phone's at another major carrier for 2 years so I consider myself pretty dam good with phones. Yet I just can't solve this problem. T-Mobile told me to go get a new SIM card, but I know they just tell that to everyone as the first step and I'm not really confident that will do anything, so I've just been to busy to get to the store to go get one.
Any help would be appreciated.