The following commands allow you to opt into receiving specific notifications on your mobile phone. When sending one of the following commands remember to add either ON, OFF, or ALL. For example: Text “SET RETWEETS OFF" to your short code. This will turn off notifications in the instance that one of your Tweets is Retweeted.
SET TWEETS - Tweets from people you've enabled for mobile notifications
SET FAVORITES - Your Tweet is marked as a favorite
SET FOLLOWS - Someone new follows you
SET MENTIONS – Someone mentions or @replies you
SET MESSAGES – Someone sends you a direct message
SET RETWEETS – Your Tweet is retweeted
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Our Twitter via SMS: Troubleshooting Tips article has answers to common problems with using Twitter for SMS.