AwumbaseCharity Said:
"how do I deactivate my stolen iPhone 11 pro if I have the serial number and the IMEI but I forgot to turn on find my iPhone"
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Finding a Lost iPhone, without Find My:
Unless you have a third-party app, then you can't. You can contact your carrier, and have them disable the SIM or eSIM card in it.
I. Use these Links:
II. Do So the Olde Fashioned Ways:
A. Backtrack your Locations:
Do it the olde fashioned way and backtrack your locations. For instance, if you were at a retail store, then stop in, asking the store manger if it was placed aside.
B. Lost-&-Found:
Chick with the Lost & Found department of the facility you were in, seeing if it has been handed over.
C. Contact Local Authorities:
See if the community police, or local security guards at the front door, came across it.
D. Use Craigslist:
Put a post on Craigslist, seeing if they have been found.
Secure your Accounts:
When it comes to Accounts, you should modify the credentials every-so-often, for security purposes.
A. Verify Your Devices:
Verify that your the devices logged in to your account or officially yours, by using this link: Check your Apple ID Device List to See where you're Signed in - Apple Support
B. Consider Modifying your Credentials:
Having been stollen, someone likey has your credentials. So, by all means, consider modifying them, starting with a new password.