How to fix iOS 7 iMessage Messaging and SMS Problem?

So i'm having trouble with my iphone after iOS 7 Update. Can anyone tell me how to fix ios 7 imessage messaging problem? I found this link but it is talking about resetting something? Won't this reset my other options? :/

Details:
ios7
imessage
sms miss send and receive

http://www.wccftech.com/fix-apple-iphone-ios7-imessage-problem-how-to/

I think the best thing to do is to buy a better phone

Nono it won't, chill. I checked the steps they are safe and should work.

Http://support.apple.com/kb/ts4268

Do the steps outlined in the part where it says it can't activate after 24 hours.

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