Phishing attempt received via text message

The messages are scam attempts, presented by criminals. Do not interact with the message or the sender. For information from Apple regarding such bogus messages, please read the information at the link below. 

Recognize and avoid social engineering schemes ... - Apple Support

The message is trying to trick you into believing that there is a problem with your phone and sell you completely useless software to fix a problem that does not exist.

If you "bite", you not only give the low lives selling this junk your money and get nothing in return, but you also provide them with personal details.

Sound good to you? If not, ignore and delete the message.

That is a scam attempt, do not interact with it. Your iPhone is not breached. Also antivirus apps are useless.