Buying second-hand electronics: a 30-minute hand-over test

You found the phone, laptop or air fryer online, agreed to meet near an MRT station or at a void deck, and now the seller is holding it out. It powers on. They are pleasant, a little hurried, and there is a queue of other buyers in the chat. The moment it changes hands is the last point at which a problem is the seller's to explain rather than yours to discover.

Thirty minutes is enough for a useful test if you plan it in advance. This guide gives a hand-over script by category, a record to keep and a clear way to leave without buying. It does not cover prices or your rights after the sale; it is about what you can check with the item in front of you.

Agree the test before you travel

Tell the seller in the chat that you will need about 30 minutes to test the item and ask for the charger or power cable to come with it. For a phone or laptop, ask them to be ready to sign out of their accounts and reset it in front of you. A seller who objects to a reasonable test by message will not become more relaxed in person.

Choose somewhere with a power socket and a seat: a café with plugs, a mall seating area or the seller's home if you are comfortable, ideally with someone you know. Bring a small kit:

• Your own charging cable and a power bank.
• Earphones or a Bluetooth speaker you know works.
• A USB stick holding a short video and a photo.
• A SIM pin tool and your own SIM card if you are buying a phone.
• Your phone, charged, for photos and notes.

The 30-minute script

1. Minutes 0–5, identity. Match the model and serial number on the device, box and any receipt. Ask how long they have owned it, why they are selling and whether it has been repaired.
2. Minutes 5–10, outside. Look along every edge under good light for dents, swelling, cracks and missing screws. Gaps along the seams can signal a swollen battery. Photograph each side.
3. Minutes 10–25, working test, using the category checks below. Use mains power and, for phones and laptops, your own cable.
4. Minutes 25–30, reset and record. Watch the reset, confirm it reaches the set-up screen, then write your record before paying.

Checks by category

Phones

• Dial *#06# and match the IMEI shown to the box and the settings screen.
• Watch the seller sign out of their accounts and reset the phone. After reset, it must reach set-up without asking for the previous owner's login; a phone still tied to their account may be unusable to you.
• Insert your SIM, make a short call and load a web page on mobile data.
• Open the camera: front, back, every lens, flash and focus. Record a ten-second clip and play it back to test the microphone and speaker.
• Drag an app icon slowly across the whole screen to find dead touch zones. View a plain white and a plain black image to spot marks or dead pixels.
• Charge with your cable, pair your earphones and test every button and the fingerprint or face unlock by enrolling your own.
• If the phone shows battery health in its settings, photograph that screen.

Laptops

• Check the serial number in the system information screen against the label and box, and confirm the processor, memory and storage match the listing.
• Open a text editor and press every key. Test the trackpad click and scrolling.
• Plug your USB stick into each port and play the video with sound, which tests speakers and screen at once. Open the webcam.
• Connect to Wi-Fi and pair a Bluetooth device.
• Unplug and run on battery for ten minutes with the video playing. A drop that feels steep is worth asking about.
• Listen to the fan and feel the base; open and close the hinge several times.
• Watch the seller sign out and remove the laptop from their accounts. Ask whether any startup password is set.

Small appliances

• Run a full, short cycle rather than just switching it on: boil water, run the blender on each speed, heat the air fryer empty.
• Smell for burning and listen for grinding or rattling.
• Check the plug, cord and any seals, and count every lid, blade or attachment.
• Photograph the label showing the model and electrical rating.

For refurbished items, ask what was replaced, who did the work and whether any written warranty comes with it, and keep that answer.

What to record

Write a short hand-over note before money moves, and send a copy to the seller in your chat so both sides have the same version:

• Date, time and place of the hand-over.
• The seller's name as shown in the chat and the listing link or screenshot.
• Model, serial number or IMEI and what came with it.
• Each check you ran and the result, including anything that did not work.
• What the seller told you about repairs, age and warranty, marked as their statement.
• Photos of each side, the reset screen and the label.

Our guide to saving the details before checkout covers the same idea for online orders. As in our product demo guide, keep what you observed apart from what you were told.

Walking away

Decide your walk-away conditions before you arrive, so the moment does not decide for you:

• The seller will not sign out or reset the device in front of you.
• Serial numbers do not match.
• The test is limited to their power bank or their earphones.
• Something fails and the explanation is that it "just needs" a part.
• You are rushed through the script.

Take Daniel, a fictional buyer meeting a seller at a food court about a second-hand laptop. Everything passed until minute 26, when the seller said they would remove it from their account "later, remotely". Daniel said, "Thanks for your time, but I'll leave it," and went home. That is a complete sentence. You do not owe a reason, and a polite exit costs less than a laptop you cannot use.

Common questions