Receiving unwanted text messages on a Boost Mobile phone can be a real problem because the company charges for text messages whether you read them or not. If you are getting text messages from a specific number, you can block the messages by sending a special text message to the number "9999."
Open the text messaging editor on your phone. It's usually on the main menu of the phone under "Text Messages" or "SMS."
Video of the Day
Create a new text message, and set the recipient as "9999."
Type the word "block" in the body of the message, followed by a space and the 10-digit number of the phone you want to keep from texting you.
Send the message.
Wait for a confirmation text message from Boost Mobile letting you know the block was successful.