Since the release of iOS 7 earlier this month, a number of users have been complaining about issues with iMessages failing to be sent or received from their iOS devices.
While Apple's iMessage service has suffered from occasional outages, including a minor one documented on the company's System Status page earlier today, some users have been complaining of multi-day outages on their devices, suggesting that something more than a simple service problem may be occurring. Anecdotal reports have indicated that the issue may have worsened with last week's release of iOS 7.0.2, but reports of problems do date further back than that...
Read the full story here... Source: Mac Rumours