What's going on with iMessage since 7.0.6 update?
Since installing the patch earlier this week, I'm no longer able to send iMessages (getting the "not delivered" message). It will go through if I change it to a text. I'm having this issue on my iPad Mini and my husband's iPhone as well. A neighbor who has an iPhone 5s is also having the problem.
iPhone 4S, iOS 7.0.6