Here’s a tip that’s worth repeating:

Don’t click on a link in a text message you get on your phone that says you’ve won a terrific prize or a gift card. Don’t reply either. It’s probably a scam.

The Federal Trade Commission settled charges with a group of marketers that were part of a scheme that sent millions of unsolicited spam text messages promoting supposedly free merchandise like $1,000 gift cards for Wal-Mart and Best Buy.

People who clicked the links in the messages didn’t get the promised prizes. Instead, they were taken to websites that asked them to give personal information and sign up for multiple offers, often involving purchases or paid subscriptions.