(TNS) -- This may be a reason not to give out your phone number.
It's been discovered that a certain string of characters sent through a text message can crash your iPhone's messaging app or even shut down your phone, CBS news reports.
All you have to do is text the code to another iPhone and it will block them from sending or receiving any text messages.
In order to get rid of the crash, the person who sent the text has to follow up with another message. But if the text message is received while the person's phone is on lock screen, the phone will reboot.
Reddit users have reported that this text can also affect the messaging app, WhatsApp, and Apple Watches, according to CBS News.
Jeff Bakalar, who is CNET senior editor, told CBS News that this "popular prank" can only be done by someone who has your phone number. There is also a way to undo the damage.
"If you have a Mac, you can log into your computer and have Siri send you a text message to wake it up," Bakalar said to CBS News.
Some Reddit users posted that the prank can also be avoided by disabling notification alerts.
©2015 The Palm Beach Post (West Palm Beach, Fla.) Distributed by Tribune Content Agency, LLC.