What to Pay Attention to When Buying a Used Phone from Ads?

Cosmetic Condition of the Phone

Although the phone is used, avoid devices in poor cosmetic condition (heavily scratched, with damaged casing, cracked or broken screens). If defects occurred after a fall, internal components may have been affected as well – pay attention to frame dents, glass pops, gaps between the screen and casing, and whether there are any loose or damaged screws. Inspect the charging port, speaker, and microphone grilles: excessive dirt or oxidation may indicate dirty, damp operating conditions.

Phone Functions

Before purchasing the phone, ensure that all its functions work properly. Check:

• Cameras (photo and video quality, autofocus, stabilization; try filming while walking – there shouldn’t be excessive shaking).
• Flash, Wi-Fi, Bluetooth, and mobile network functionality (calls, mobile data, SMS sending/receiving).
• Speaker and microphone during calls (record a voice memo and listen to see if the sound is clear, without crackling).
• Charging and headphone jacks and all buttons (including volume, power, and mute switch, if available).
• Touchscreen sensitivity by moving an app across the entire screen (there shouldn’t be any “dead” zones or double touch effects).
• Proximity and light sensors (hold the phone to your ear during a call – the screen should darken; check automatic brightness).
• Biometrics: create a new face/fingerprint in the “Face ID” / “Touch ID” settings screen and ensure that unlocking works reliably.
• Battery condition: for iPhone – Settings → Battery → Battery Health (Maximum Capacity); for Android – check the manufacturer’s diagnostic tools or battery statistics.

Phone Packaging

It is advisable to buy a phone with a complete set (box, documents, charger, headphones – if included). If the phone is sold with a box, check that the box and phone IMEI numbers match. Keep in mind that some newer models no longer include a charger in the package, so this is not necessarily a drawback; the most important thing is clear device origin and documentation.

Phone IMEI Number

Check that the IMEI number displayed on the phone screen matches the number on the casing and box (if available). You can find the IMEI by dialing *#06# in the call window. Check the IMEI to see if the phone is reported stolen or blocked – you can do this through specialized self-service systems, such as manoimei.lt. If the IMEI has a negative history or is on a blacklist, the device may lose mobile network services.

Phone Cameras

Carefully inspect the cameras from all sides. If you see dirt or condensation marks under the camera lenses, it is likely that the device has been disassembled or has been exposed to moisture. Check for unusual spots, “ghosting,” bright lines, or haze in photos, and in night mode, ensure that the focus is accurate and there is no excessive noise.

Phone Authenticity

If you have doubts about authenticity, check the serial number or IMEI in the manufacturer’s self-service or official service. For Apple devices, you can additionally view battery health information and find out if the battery/screen is original and whether they have been replaced, which helps assess the repair history. It is better to avoid devices with counterfeit identification stickers or discrepancies in documentation.

Extremely Low Price

If the price is significantly lower than the market, check the device very carefully. Do not send deposits to unknown individuals, do not accept deals under pressure to “hurry up,” and do not agree to unclear shipping conditions. It is best to conduct the transaction in person, checking the phone on-site, and if there are doubts about safety – consult the police.

Sources: “Mano IMEI” – IMEI check and FAQ; operator recommendations for *#06# and IMEI checking; “Apple” Battery Health explanations; Police tips on deposits and fraud prevention.