Siri doesn’t have the ability to tweet your voice via twitter application, BUT here is a simple way allows you to do. The method to tweet via Siri will be the best feature in the iPhone 4s now and then in iPhone 4 and iPad 2.
The method discovered by Mashable and you can make it yourself image by image.
Step 1: Home Page > Setting
Step 1: Home Page > Setting
Step 2: Mobile.
Step 3: Phone number > Start > Go
Step 4: New Message.
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