How can I make my samsung vibrate wheN i receive a text?

I have a ghetto samsung flip phonE (sgh-a436) Quadband. How can I make it vibrate when I recieve texts. They seem to hide it deep in the settings or something because I had it set up like that before. Now I have been looking for hours and I'm getting kind of P'd.How can I make my samsung vibrate wheN i receive a text?try in menu%26gt;settings%26gt;set sound%26gt; message tone%26gt;alert type.

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