If you're like most people, your primary form of communication has gone from making phone calls to sending text messages. It's so much more efficient, which is why it's become so popular and why it's now another scammer/spammer targeting tool. Legitimate text messages can come from those that aren't in your contacts so you can't simply dismiss any message that comes from an unknown number. Scam phone calls are also on the rise thanks to robocalling, so you can fight both these challenges with an app from Truecaller: https://www.truecaller.com It's a community-based reporting app a.k.a. a crowdsourced database of junk and scam calls and messages from millions of users around the world. It can also provide some more details for calls and texts that aren't in your contact database, so you can make better decisions about them. It's another company attempting to stay ahead of the bad guys that you can try for yourself at: https://www.truecaller.com