My imessage isn't working on my iPhone 4S? How can I fix it?

It was delivering, but then all the sudden it said it wasn't delivering! How do I fix it? Thanks.

Added (1). I tried turning my phone on then off, still never worked. So I tried turning imessage off& it say waiting for activation, it's been like that for awhile now.

You could turn off your iphone and try again and see if that works. You could also close imessage and try again and see if that works.

Your phone is working fine!
iMessage works via iOS devices, so your message is sent, delivered, and read.
iMessage will show when it has been sent, delivered, and read (if the recipient has enabled that option.

As long as your iMessages are sending, your phone is working FINE. An iMessage can't be delivered when the receiving person doesn't have service/Wi-Fi. The other person is who is at fault and when their phone regains service or Wi-Fi, your iMessage will be delivered.

Sending additional iMessages will not change anything, but they'll receive them all when getting service. If they turned off data (3G or 4G, which is what iMessage works through) then you can always hold down on your message and have the option of "Send as Text Message"
Don't worry!

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