Open the Messages app
Open the junk text
Tap the sender name or number at the top
Tap Info
Tap Block this Caller
Go to Settings
Tap Messages
Turn on Filter Unknown Senders
Go to Settings
Tap Phone
Tap Silence Unknown Callers
Go to Settings
Tap Notifications
Tap Messages
Turn off notifications for message previews if needed
Report spam to your carrier if available
Delete the junk messages
Avoid replying to unknown numbers
Avoid tapping links in suspicious texts
Use a third-party spam filter app if needed