I think there is something fundamentally flawed with T-Mobile's group messaging. As I said in my previous post, it worked great until sometime last year. T-Mobile eventually acknowledged that there was a problem and fixed it. I no longer send blanks but I'm still seeing issues sending group texts to iPhone users on AT&T. What's interesting is if I use Google Hangouts or Go SMS Pro, they work OK. However they don't work with wi-fi calling. So with T-Mobile's crappy coverage, I have to use wifi calling at home thus no group texting at home. I've been a T-Mobile customer for a long time and don't want to switch, but I'm about to.
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