How To Check Waterproof Performance When Buying A Used Phone (Simple Tips!)

Buying a used phone can save money, but how do you know if it's still waterproof? Waterproof phones (like iPhones or Samsung Galaxies) often lose their water resistance over time, especially if they've been dropped, repaired, or used for years. Here's a simple, safe guide to check waterproof performance without drowning your phone!

 

1. First: Understand the Limits

"Waterproof" isn't forever
Phones with IP67/IP68 ratings are tested in labs under perfect conditions. Real-world damage, repairs, or aging can break the seals.

Don't trust a "water test"
Sellers might dunk the phone in water to "prove" it works-but this could hide hidden damage. Avoid it!

 

2. Easy Checks Anyone Can Do

 

Step 1: Look for Physical Damage

Check cracks or gaps
Inspect the screen edges, charging port, and back cover. If you see cracks, dents, or glue sticking out, the waterproof seals might be broken.

Test the SIM tray
Pull out the SIM card tray. Look for a small rubber ring inside-if it's missing or torn, water can easily get in.

 

Step 2: Spot Repair Signs

Check the screws
Original screws often have warranty stickers or colored coatings. If they're scratched or missing, the phone might have been opened (and seals replaced poorly).

Ask for repair history
Use the phone's serial number to check the brand's official website or contact support. Official repairs usually replace waterproof seals.

 

Step 3: Quick DIY Tests

Try the "fridge trick" (carefully!)

Put the phone in a dry ziplock bag.

Leave it in the fridge for 10 minutes.

Take it out and watch for fog inside the camera or screen. Fog = possible seal issues (repeat to confirm).

Use the "pressure test" (for Samsung/Android)

Dial *#0*# to open the secret menu.

Go to Barometer Sensor.

Press the screen gently-if the air pressure number doesn't change much, the seals may be weak.

 

3. When to Ask for Help

Visit a repair shop
Some shops use special tools to test air pressure inside the phone. But this might require opening the device-ask about risks first!

Buy certified refurbished
Brands like Apple or Samsung sell refurbished phones with new seals and warranties. Safer but pricier!

 

4. What to Avoid

Never submerge the phone
Even if it survives, water damage might show up later. You'll have no proof it was the seller's fault.

Skip hot or salty water
IP ratings don't cover hot tubs, pools, or oceans. Waterproof phones are only meant for accidents (like spills or rain).

 

Final Tips

If waterproofing is critical, buy a new phone or certified refurbished.

Always ask the seller for a "no water damage" promise and save the chat history.

Remember: No used phone is 100% waterproof. Treat it like a water-resistant device!

By following these steps, you'll reduce risks and make a smarter choice. Stay dry out there! 🌧️📱

 

Vocabulary Help

IP rating: A waterproof standard (e.g., IP68 = survives 1.5m underwater for 30 mins).

Seals: Rubber or glue parts that block water.

Refurbished: Repaired and cleaned by the brand, like new.