I sick of my grandson passing my serial number giving it to everyone

sickofbeingplayed60 Said:

"I sick of my grandson passing my serial number giving it to everyone: [...]how can I stop him getting in my iCloud taking what he wants[...]"

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Troubleshooting Family Account Activity:

Troubleshoot this like you would any hacked account. Some thoughts...

Secure your Account:

A. Verify your Devices:

Verify that all device are logged in to your account, by using this link: Check your Apple ID Device List to See where you're Signed in - Apple Support

B. Modify your Credentials:

Having been stollen, someone lily has your credentials. So, by all means, modifying them. Starting with a new eMail.

• Modify: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option

C. Don't Share your Credentials:

How does he know of this info? Probably because you've shared it with him. So, refrain from sharing it, and start with a new eMail address for your Apple ID. Don't share the eMail address.

C. Set this Up Anew:

If you are so concerned, then reset your iPhone, as if you were to sell it. Perform as interacted here, including the iCloud Logout and backup creation: What to do Before you Sell, Give Away, or Trade in your iPhone, iPad, or iPod touch - Apple Support. All would be seen anew once you reset it. the phone number will not be removed --so no worries there.

Based on what you’re reporting, this appears to be a civil or criminal matter. Contact police.

The serial number gets you nothing. The IMEI gets you nothing. There is something else going on here; some other compromise.

Here is a guide to how to review and secure your device and your Apple ID:

… Personal Safety User Guide - Apple Support

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Change all your passwords and make them hard to guess, and different

then put your phone in lockdown mode just in case your grandson is hacking it