I can't sent or recive text message on iPhone?

So I accidentally turn off IMessage on my iPhone 4 and when I turn it on I can only recive from my email and I want to be able to sent & recive it off my number. But it doesn't let me. And it doesn't let me have an option to chose what to sent it from and it won't let my number do those. And it also says Waiting for Activation.

Look in your settings and see what you have your messages set on

When you turn iMessage off and turn it back on, "waiting for activation" takes awhile to go away. After it goes away it'll go back to sending from your phone number.

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