I have an iPhone4 and updated to iOS6 yesterday. I no longer can use iMessage, FaceTime, or apps like Twitter. I have reset my network settings and restarted my iPhone multiple times, as well as updating my iTunes on my laptop and syncing my phone, and backing up over iCloud. My Messages settings page on my iPhone looks as follows: iMessage ON Waiting for Activation... SMS/MMS MMS Messaging ON Group Messaging ON Show Subject Field OFF Character Count OFF There are no other options shown on the "Messages" settings page. Please help! I feel like I've tried everything I've seen on other forums.