Since I've had my launch iphone 5 16gb Verizon I've only revived 2 group texts and each time my phone is extremely sluggish when opening the text app or looking at the texts or even when not in the app when I get a new text in a group message it slows down a lot, even freezes sometimes. Has this happened to anyone else? Normal texts and iMessage are fine. The first group text was 17 people and recently was 3. Neither were getting tons of messages or anything, just one every few mins. But both slowed the phone till I deleted the text thread.