I've been using an LG V60 on AT&T for a couple of months. Messaging using Google Messages has worked without issue. About a month ago, I got an AT&T LG Velvet to try out. Used it for a day or two, then swapped back to my V60. Over the last couple of weeks, I've used my Velvet on WiFi only. Here's the issue, and it only happens with one of my contacts: I do not get any texts from this contact on my V60 with my AT&T sim. All of his texts are only delivered to me via my Velvet using only wifi. Even when I initiate the text from my V60, I only get a response when I turn on the Velvet and it logs onto my wifi. Don't know what's going on.