Twitter added a few new features to make Twitter even more useful with SMS:
- Fast Follow. Anyone in US can receive Tweets on their phone even if they haven't signed up for Twitter. Say, you want to get Tweets from New York City's office of emergency management (@NotifyNYC). Just text "follow NotifyNYC" to 40404 in US. If you want to appear in a user's followers list or start to get followers, you'll need to create a Twitter account. You can SMS by texting 'signup" to Twitter.
- Set SMS alerts: When you see a user on Twitter.com, you can hover over their name or avatar, and clicking phone icon that appears in hovercard, will get you an SMS message on your phone, whenever the user Tweets. It's easy to set alerts from your phone. Send "on [username]" or "off [username]" to 40404 in the US.
- Tell Twitter to be quiet. Turn text messages on or off by sending "on" or "off" to Twitter. You can also go to settings page if you want to turn off text message updates during a certain time period.
- Keep up with latest Tweet. If you text 'Get [username]', that user's most recent Tweet will be sent to your phone, even if you don't follow them. There're a bunch of other fun commands you can use with Twitter on your phone.