juliemohler wrote:This is not an iPhone issue. AT&T limits the number of contacts that can be added into a group message. It doesn't matter what brand of phone. The most that can be added to a group message is 10, regardless of the type of phone the sender or recepient has.
unless you are texting a non-apple phone, all messages are sent through the Apple Iphone servers utilizing the cellular data network and never touch att cellular network.