Although Siri doesn’t offer a built-in way to update your Twitter or Facebook status by voice, Siri does send text messages, so all you have to do is set up your phone to send status updates by text and Siri will cooperate. Of course, text messaging rates may apply depending on your plan.

For Facebook, text “Hello” to 32665 in the United States (or the short code for whatever country you’re in), then follow the link in the reply to finish the setup process. Add the short code to your Contacts, and name it “Facebook.” That way, you can tell Siri to “send a text to Facebook saying …”

For Twitter, text “START” to 40404 in the United States (or the short code for other countries), then respond with your username, then your password. Add the short code to your Contacts with the name “Twitter.”

For Google+, visit your settings page and scroll down to “Set delivery preferences.” Add your cell phone number, but be sure to click “don’t notify me” if you don’t want incoming Google+ messages by text. Verify your number with the code you receive by phone, then add the short code “33669″ (in the U.S.) to your contacts as “Google Plus.” Updates are shared with everyone in your circles.