For Android (Steps may vary slightly by manufacturer and Android version):

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Settings App (Common Path):

Open the Settings app (the gear icon).
Scroll down and tap About phone or About device (sometimes it's under "System" first).
Look for "Phone number," "My phone number," or "SIM status." Your number should be displayed there.
On some phones (like Samsung Galaxy), your number might be listed directly at the top of the "About phone" page.
On others, you might need to tap Status or SIM slovenia phone number list Status and then look for "My phone number."
Contacts App (or Phone App's Contacts Tab):

Open the Contacts app or the Phone app and go to the "Contacts" tab.
Look for an entry at the top, often labeled "Me," "My info," or simply your name/profile icon. Tap on it.
Your phone number should be listed there.