IPhone 5S iOS 8.3 failed activation?

Okay so everybody knows about that string of text that crashes iOS devices, and I sent it to myself to see if it worked and now iMessages won't work. I tried resetting it, turning iMessage off, sending photos, but to no avail. I got it to work for like 10 seconds and I saw a message to myself but it then crashed. Now it won't let me use my phone number for sending and receiving, it just keeps saying "An error occurred during activation. Please try again." If anyone else has any resolutions, please share!

You were stupid enough to send it to yourself (!) and now you want us to fix it? Go stand in the corner until your father gets home.

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