That "Hiii there!" text from an unknown number is likely a "smishing" (SMS phishing) scam, a common tactic where scammers send generic greetings to random numbers, hoping you'll reply to confirm your number is active, leading to more detailed scams, malware, or data theft; the best response is to delete it, block the number, and report it as spam, as replying confirms your number is live and marks you as a potential target for other fraudsters