Did you know you can completely control twitter via SMS. Go to your twitter profile and add your mobile number and allow SMS control if asked. Make a note of the twitter SMS number.

Twitter SMS Commands –

Turning mobile Twitter updates OFF and ON:

ON: turns ALL your authorized Twitter updates and notifications on.
OFF: turns ALL phone notifications off.
ON [username]: turns on notifications for a specific person on your phone. Example: ON alissa
OFF [username]: turns off notifications for a specific person on your phone. Example: OFF blaine
FOLLOW [username]: allows you to start following a specific user, as well as receive SMS notifications. Example: FOLLOW jerry, or F jerry, for short.
UNFOLLOW [username]: allows you to stop following a specific user.
LEAVE [username]: this command allows you to stop receiving SMS notifications for a specific user without having to unfollow them. When you log into twitter.com from the web you will still see this user’s updates in your timeline. Example: LEAVE benfu, or L benfu, for short.
STOP, QUIT, END, CANCEL, UNSUBSCRIBE, or ARRET: will deactivate your account if you are an SMS-only user. If you completed the sign-up flow on the web, sending any of these commands to your Twitter short code will simply remove your phone number from your Twitter account.
Fun stuff – friends, favorites, and stats:

Use the commands below to send direct messages, mark Tweets as favorites, and more.

@[username] + message – shows your Tweet as a reply directed at another person, and causes your Tweet to save in their mentions tab. Example: @meangrape I love that song too!

D [username] + message – sends that person a Direct Message that goes to their device, and saves in their web archive. Vital you keep SMS under 160 characters
RETWEET [username] – sends that user’s latest Tweet to your followers
SET LOCATION [place name] – updates the location field in your profile.
SET BIO – edits your Bio information on your Twitter profile.
SET LANGUAGE [language name] – selects the language you’d like to receive notifications in.
SET NAME [name here] – sets the name field on your Twitter profile.
SET URL [url here] – sets the URL field on your profile.
WHOIS [username] – retrieves the profile information for any public user on Twitter.
GET [username] – retrieves the latest Twitter update posted by that person. You can also use g [username] to get a user’s latest Tweet. Examples: get goldman or g goldman.
FAV [username] – marks that user’s last Tweet as one of your favorites (reply to any update with FAV, FAVE, FAVORITE, FAVOURITE, or * to mark it as a favorite if you’re receiving it in real time). Examples: fav crystal, fave crystal, favorite crystal, or *crystal
STATS [username] – this command returns the given user’s number of followers, how many people they’re following, and their bio information.
SUGGEST, SUG, S, or WTF – this command returns a list of Twitter users we think you might find interesting and would like to follow.
HELP, INFO or AIDE – texting help, info, or aide to Twitter will bring up helpful tips.
SUGGEST – this command returns a listing of Twitter users’ accounts we think you might enjoy following.

A few notes on SMS commands:

Using ON/OFF [username] from your phone only stops notifications coming to your mobile phone; you’ll still collect a person’s updates on the web since you’re still following them.
Use UNFOLLOW [username] to unfollow a user via SMS.
Use BLOCK [username] or BLK [username] to block a user via SMS.
You can also use UNBLOCK [username] or UNBLK [username]
Use REPORT [username] or REP [username] to report a user as spam.
The following commands perform the same actions: FOLLOW = ON. And LEAVE = OFF.
Following someone from a phone for the first time will also cause you to follow them on the web.
You don’t have to use ON/OFF [username] from your phone, you can also set individual notifications from a person’s profile page on the web, or check your following page and manage all phone notification settings there.