Open the Messages app
Open the unwanted text
Tap the sender’s name or number at the top
Tap Info
Tap Block this Caller
Confirm Block Contact
Open Settings
Tap Messages
Turn on Filter Unknown Senders
Open Settings
Tap Phone
Tap Blocked Contacts
Add unwanted numbers to the blocked list
Open Settings
Tap FaceTime
Block unwanted contacts there too
Report spam texts to your carrier
Forward spam messages to 7726
Delete unwanted messages after blocking
Turn off notifications for unknown senders if needed