Iphone 6 Group message replies fail
I have a new Iphone 6 and I'm not even sure what my settings should be for messaging. In the last couple days I have received some group messages and when I try to reply I get a message that the attempt has failed. I did not initiate these messages, just trying to reply to them, and the group includes Iphone and Android users. Thanks!
iPhone 6, iOS 8.0.2