Used Phone Buying Checklist: Verify Before You Pay

The risk regulation removed

The oldest problem with buying second-hand was not condition — you can see condition. It was the expiry date: nobody could tell you how much supported life a three-year-old phone had left, so buyers discounted heavily to cover an unknown.

The EU ecodesign rules that began applying on 20 June 2025 changed that for phones sold in the EU. Updates run for at least five years from the date the last unit of that model is sold, parts must be available for at least seven years after the model leaves the market and supplied “within 5-10 working days,” and every model carries a repairability score from A to E on its label.

Two of those matter enormously for a used buyer. The update clock starting at end-of-sale rather than launch means a long-selling model has a later expiry than its age suggests. And a phone rated A for repairability is a phone whose battery you can economically replace, which is the difference between a three-year purchase and a six-year one. Both belong at the very top of a used phone buying checklist.

Three lookups before you meet anyone

1. The support expiry. Find when the model stopped being sold new, add the manufacturer’s committed update window, and write the date down. If the remaining window is under two years, the price needs to reflect that.
2. The repairability class and battery rating. Look the model up in the public EPREL database if it was sold in the EU. A poor repairability class is not a dealbreaker; an unknown one at a premium price is.
3. The realistic market price. Check completed sales, not asking prices. Asking prices tell you what optimistic sellers hope for; completed sales tell you what the phone is worth.

Doing these three first is what separates a used phone buying checklist from a list of things to poke at in a car park. They cost ten minutes and they set your maximum offer.

The physical inspection, in order

Inspect in this sequence, because each step can end the transaction before you waste time on the next.

• Screen, on a white background and then a black one. White reveals dead pixels and discoloration; black reveals backlight bleed and burn-in. Check for burned-in status bar elements on OLED phones.
• Frame and glass under angled light. Look for a bent frame or separation at the edges, which indicates a drop or a swollen battery.
• Cameras. Open the camera app, use every lens, and check for dust or scratches on the lens covers. Shoot into a bright light to reveal flare from a cracked cover.
• Ports and buttons. Charge it. Plug in headphones if there is a jack. Press every button several times.
• Speakers and microphones. Play audio and record a voice memo. Make a real call if you can.
• Water indicators, where the phone has an accessible SIM tray. A tripped indicator does not mean failure, but it means the price should drop.

Do all of this before discussing money. A seller who will not allow a fifteen-minute inspection is telling you something, and no used phone buying checklist survives a rushed meeting in a car park.

The lock checks that kill a deal

The first row is non-negotiable and it is where most bad used purchases go wrong. The phone must be signed out of the seller’s account and factory reset in front of you, then set up far enough to confirm it does not demand the previous owner’s credentials. “I’ll remove it later” is not a thing that happens.

For the IMEI, read the number from the phone itself rather than a screenshot, and check it against a reputable blacklist service. A blacklisted handset can be blocked from networks at any time, and no refund policy on a private sale will help you.

Battery, and what health figures mean

If the phone reports a battery health percentage, treat it as a useful indicator rather than a measurement — it is an estimate derived from cycle count and charging history. A figure in the high eighties on a three-year-old phone is normal. A figure in the seventies means budget for a replacement, which is exactly where the repairability class you looked up earlier becomes money.

If the phone does not report health, check cycle count where the operating system exposes it, and otherwise judge by behavior: charge to full, use it for fifteen minutes of something demanding, and watch whether the percentage falls in a straight line or drops in steps. Step drops indicate a cell that can no longer hold voltage under load.

Price, payment and paperwork

Meet somewhere public with reliable network coverage — you need to test calls and data. Pay by a method with buyer protection where the platform offers it, and get the seller’s name and a receipt even for a private sale, however informal.

On price: start from completed sale figures, subtract for every defect you found, and subtract again for a short remaining support window. Refurbished sellers charge more and give you a warranty and a return period, and for anyone who does not want to run this process, that premium is usually worth paying — a refurbisher is, in effect, selling you the used phone buying checklist already completed.

The checklist

• Calculate the remaining update window from end-of-sale date, not launch date.
• Look up the repairability class before agreeing a price.
• Inspect screen, frame, cameras, ports, audio — in that order, before talking money.
• Watch the sign-out and factory reset happen in person. No exceptions.
• Verify the IMEI read from the device itself.
• Test a call and mobile data before you hand over payment.

Run through that used phone buying checklist properly and the second-hand market is one of the best values in consumer technology — a two-year-old flagship inside its support window outperforms most new mid-range phones at the same price. Skip the account and IMEI steps and it is one of the worst, because those two failures cannot be fixed at any price after the money has moved.