Unlike how it may seem, securely erasing data from your phone doesn’t start and end at a simple factory reset, although that’s one of the steps. In reality, your phone doesn’t delete data, it simply overwrites it.
When you delete something on your phone, it’s not really gone. The file just gets hidden and the space is marked as free. If nothing overwrites that spot, the data is still accessible. That’s why businesses hire professional data destruction services when selling or recycling devices.
This guide will show you how to properly and securely erase data from your phone before selling or recycling it.
Steps Before You Factory Reset
Save your information to Google, iCloud, or external storage to ensure nothing important is lost.
Move files to an external hard drive or USB to keep a secondary backup of your photos, videos, and documents.
Ensure contacts, calendars, and media are saved. Double-check your backups before erasing your device.
How To Backup?
| Device | Steps |
|---|---|
| iPhone | Settings > [Your Name] > iCloud > iCloud Backup > Back Up Now |
| Android | Settings > Google > Backup or Samsung Cloud > Back up data |
Factory Reset Your Device:
| Device | Steps |
|---|---|
| Android | Settings > System / General Management > Reset > Erase all data (factory reset) |
| iPhone | Settings > General > Transfer or Reset iPhone > Erase All Content and Settings |
A factory reset is generally sufficient for most users, but residual data may still remain. For extra security, additional steps are recommended.
How To Securely Erase Data
The free method is simple, but more time-consuming. The way it works is that when you factory reset your device, your data can still be seen because it technically is still there till something else is written on that space after reset.
So to further secure your phone, you need to fill up that space with irrelevant/unimportant data; dummy data. You can do this by plugging in your phone and recording a video at the highest quality while it’s face down. Do this until the device’s storage is full. After that is done, factory reset the phone again. If any retrieval is done, it would bring up the dummies rather than your deal.
The drawback of this has to be the time constraint and the strain on the phone, which will only make the process even longer. This is because, as you are recording for that long period of time, your phone could heat up and stop recording a good number of times.
Note: This method is time-consuming and may strain your phone.
The paid method involves the use of various applications that are paid for and are known to provide verifiable results. The whole point is that they can help providers dummies or properly encrypt the data so that it can not be retrieved by forensics and specialised tools.
If you are looking to save more time and to properly secure your data, then you should consider making use of specialized data erasure software like iShredder, Dr.Fone, iMyFone, etc. These tools are available for both iOS and Android.
✅ Faster, more reliable, and suitable for both Android and iOS devices.
Final Thoughts
A factory reset is a good start, but it doesn’t always fully erase your data. For most users, it’s usually enough, especially on newer encrypted phones.
If you want extra peace of mind, take additional steps to properly wipe your device. A little extra effort can go a long way in protecting your privacy.
Check Your Phone’s ValueFAQs: How to Securely Erase Data From Your Phone
Watch Out for Phishing & Social Engineering
Scammers are clever. Spot the warning signs and stay protected.
Smishing (SMS Scams)
Urgent texts claiming to be your bank or delivery service. Don’t click links; go directly to official apps or websites.
Email Phishing
Check sender addresses carefully. Display names like "Apple Support" can be fake — inspect the actual email address.
Voice Phishing (Vishing)
Scammers can clone voices. Hang up on unexpected calls asking for money or sensitive info, then verify with the person directly.
Golden Rule
No legitimate company will ask for your password, PIN, or 2FA code. If they do, it’s a scam.
Watch Out for Phishing and Social Engineering
Scammers are clever. Learn how to recognize the warning signs before they trick you.
Smishing (SMS Scams)
Urgent text messages pretending to be your bank or delivery company. Never click links in suspicious texts. Always go directly to the official website or app.
Email Phishing
Always check the real sender email address. Display names like “Apple Support” can be faked. Verify the actual domain before trusting any email.
Voice Phishing (Vishing)
Scammers may use AI to clone voices of family members or officials. If a call asks for money or sensitive data, hang up and verify directly.
Golden Rule
No legitimate company will ever ask for your password, PIN, or 2FA code. If someone asks for it, it’s a scam.