Hi, and thank you for your question.
I assume you are getting an automated phone call claiming that suspicious/unusual activity has been detected for your iCloud account and prompting you to call back an 1-800 number. If so, please IGNORE and absolutely do not call back that number - it's 100% scam and not affiliated with Apple in any way. They trick users into providing their personal and financial info while pretending to be from Apple, and so if you simply ignore such calls as they come, they will stop calling shortly after.
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