What it is
What you may notice
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Unexpected SMS fees or small recurring charges
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Subscription emails/texts you don’t remember approving
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App asks for phone/SMS or billing permissions it shouldn’t need
How it slips in
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Look-alike listings on official stores or sideloaded APKs
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Fake trials: tiny text, auto-renew toggled on by default
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Aggressive prompts: “Verify phone” or “Enable premium features”
Fix it now (quick steps)
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Uninstall the suspicious app.
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In your carrier account/app store, cancel subscriptions and block premium SMS.
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Contact your carrier/bank to dispute charges and add spending limits.
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Run a mobile anti-malware scan; review app permissions.
Prevent it
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Install only from trusted developers; read recent reviews and permissions.
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Avoid sideloading; be wary of “free trials” requiring a phone number or card.
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Use family/expense controls on carrier and app-store accounts.
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Keep the OS and security apps updated.