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Phone & Device Security·Updated 2026-10-21

How do I know if my phone has been hacked?

Short answer

Common signs include apps you did not install, sudden battery drain or data use, pop-ups, settings that change on their own, unknown device administrator profiles, and accounts sending messages you did not write. One sign alone is often harmless; several together deserve a closer look.

The details

Start by updating the operating system, removing apps you do not recognize, and checking which apps have accessibility, device administrator or profile permissions. Change the passwords for important accounts from a different, trusted device.

If problems continue, back up your photos and documents (not apps), then do a factory reset and reinstall apps only from the official store.

Useful next reads and tools

Sources

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