Hi, I am brand new and I hav had that prob, was going to ask that question myself. In my case I keep getting a reply from Bt telling me not delivered, but because I am a dork I thought it may be me, now u asked I think maybe it is not me, good luck and nice to meet u, beepsy
There is a known issue with iMessages not getting sent on iOS 7. The fix is to restart the device, and it should work again, at least for a while.
I have not been able to use FaceTime or iMessage either one and I have rebooted reset and done several things and it hasn't worked since the update. What else is left to do short of smashing the thing. Lol
Can you describe your problem in more detail? Are you unable to activate FaceTime or Messages, or are you not able to connect to others even though the seem to be active?
It's telling me I cannot sign in and check my network connection. I've reset rebooted and done nothing to get back after the updates. I even changed my iTunes passwords still got the same messages. On both FaceTime and iMessages.
This is a bit drastic, buy you could try Reset All Settings under Settings > General > Reset. It won't delete any of your content, apps, or accounts, but it will default most of your other settings, so you will have to go back and re-tweak things the way you want them. If that does not work you may have to restore the iPad using iTunes and a computer. That's been the final fix for some of the more persistent problems people have had after the update. The OTA update isn't as reliable, since it does not overwrite the existing OS, but patches it. The iTunes update is a clean install of the OS, and less likely to encounter problems. The bug that's been going around and that Apple is supposed to fix has to do with undelivered messages, so it's unlikely that it is related to your problem.
I have done the general reset and re tweak things on it. The only thing I've not done is hook it to the computer and iTunes yet. Thx for your help. I went to best buy and ask the geek squad their take on it and they said apple was working on a fix and keep checking my updates as they would put it on there. Thx again.