I reset My iPhone 4s and now it won't activate?

I reset my phone so I can download iOS 7, but now it wont activate. I need help. It keeps telling me "We're sorry, we are unable to continue with your activation at this time."

It needs a stronger signal connection. Shut the iphone first then switch it on after a couple of hours. The system will reboot and try again.

Is ir sim in it? If you have ios 7 then you canr activate it put it on recovery or dfu mode then restore

You won't be able to activate iOS 7 unless your device's UDID is registered with a site like http://www.instantudid.com/. That's where I did mine. It's $5 and they handle it instantly.