According to Block, filter, and report messages on iPhone, the simplest method is...If you haven’t opened the message: Swipe left on the message, tap, then tap Delete and Report Junk.
Report spam or junk messages
When you use iMessage, you can report spam or junk messages to Apple, which then receives the sender’s information and message. Depending on your carrier and country or region, you can also report spam you receive with SMS and MMS.
- Open the Messages app on your iPhone.
- Do one of the following:
- If you haven’t opened the message: Swipe left on the message, tap , then tap Delete and Report Junk.
- If you’ve already opened the message: A Report Junk link appears at the bottom of any message from any unknown sender. Tap Report Junk, then tap Delete and Report Junk.
- Note: You can’t report a message after you’ve replied to it.
- If you don’t see the option to report spam or junk messages you receive with SMS or MMS:Contact your carrier. See the Apple Support article Wireless carrier support and features for iPhone.
The sender’s information and the message are sent to Apple, and the message is permanently deleted from your iPhone.
If you accidentally report and delete messages, you can recover them.
Reporting junk or spam doesn’t prevent the sender from sending messages, but you can block the number to stop receiving them.
To decrease incoming spam or junk messages from new numbers, you can filter them. See Filter messages from unknown senders, above.