How Do You Know If Your Phone Has Been Hacked?
Phone hacks are more common than most people realize. Here are the warning signs and exactly what to do if your phone is compromised.
General information, not professional advice — see terms of use.
Performance warning signs:
- Battery draining much faster than normal (malware runs constantly)
- Phone running hot when not in use
- Unexplained data usage spikes
- Slower performance, frequent crashes
Activity warning signs:
- Calls, texts, or emails sent that you didn't send
- Unfamiliar apps installed
- Accounts logged in from unusual locations
- Contacts receiving strange messages 'from you'
- Unexpected account lockouts
- Unusual charges on your phone bill
What to do:
1. Change passwords for all important accounts from a different device
2. Enable two-factor authentication on all accounts
3. Remove apps you don't recognize
4. Run a security scan (Malwarebytes, Bitdefender)
5. Check your Apple ID or Google account for unrecognized devices
6. Contact your carrier to check for SIM swapping
7. Factory reset as a last resort
Follow-up questions
Can someone hack your phone just by calling you?
In extremely rare cases, sophisticated state-level hackers have used zero-click exploits. For the average person, simply receiving a call cannot hack your phone. However, calling back suspicious numbers or downloading files from voicemails can lead to compromise.
What is SIM swapping and how do you prevent it?
SIM swapping is when a hacker convinces your carrier to transfer your phone number to a SIM they control, then receives your calls, texts, and 2FA codes. Prevention: add a PIN to your carrier account, use authenticator apps instead of SMS for 2FA, and ask your carrier about a port freeze.
What is the most common way phones get hacked?
The most common methods are: malicious apps from unofficial app stores, clicking phishing links in texts or emails, connecting to unsecured public WiFi without a VPN, and SIM swapping. Most hacks require some action from the victim — being cautious about what you click and install dramatically reduces your risk.
More cybersecurity answers
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