Open the spam text
Tap the sender name or number
Tap Info
Tap Block this Caller
Turn on Filter Unknown Senders in Settings > Messages
Report junk messages to your carrier
Delete suspicious messages
Do not reply to spam texts
Do not tap links in spam texts
Do not share your phone number publicly
Use Silence Unknown Callers if needed
Keep iPhone updated
Enable carrier spam protection if available
Use a third-party spam filter app if needed