Buying a Phone on Facebook Marketplace: 17 Checks UK Buyers Should Make Before Paying

Buying a phone on Facebook Marketplace can save you hundreds of pounds, particularly on recent iPhones, Samsung Galaxy phones and Google Pixels. However, a convincing advert and a phone that looks immaculate in photographs do not tell you whether the handset is stolen, blacklisted, still financed, account locked or hiding an expensive fault.

Before you send any money, ask the seller privately for the phone’s IMEI and check the device with MyMobiCheck. An IMEI check can reveal important device-status information that simply cannot be established from a Marketplace photograph.

Even a clear IMEI result is not the end of the process. You should still inspect the phone, test its important functions, confirm that the previous owner’s accounts can be removed and understand exactly who is selling it.

Meta advises people buying and selling electronics through Marketplace to record identifying information such as the serial number or IMEI. Apple goes further for second-hand iPhones: if an iPhone is Activation Locked, Apple advises buyers not to purchase it.

UK government guidance also recommends physically inspecting second-hand products where possible, particularly electrical or mechanical items where wear, damage or modifications may not be obvious.

Here are the 17 checks worth making before you buy.

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1. Look at the seller before you look at the phone

Start with the Facebook profile behind the listing.

A long-established account does not guarantee that the seller is genuine. Equally, a newer account does not automatically mean fraud. Nevertheless, the profile can provide useful context.

Look for consistency

Consider whether:

• the account appears established;
• the seller’s name is consistent throughout the conversation;
• the profile and Marketplace location make sense;
• the seller has several identical new phones listed;
• their other listings suggest private selling or commercial trading;
• the photographs appear to belong to the same person and location;
• their explanation for selling the phone sounds credible.

One unusual detail is not proof of a scam. However, several inconsistencies should make you more cautious.

2. Compare the price with the real market

A genuine private seller may accept less than a retailer because they do not provide the same warranty, returns process or overheads.

However, a nearly new flagship phone offered at a fraction of its normal used value needs an explanation.

Compare the listing with:

• other Marketplace listings;
• used-phone retailers;
• refurbished-device sellers;
• completed marketplace sales where available;
• trade-in values.

Report Fraud advises consumers to be cautious where an offer appears too good to be true. Therefore, treat a spectacular discount as a reason to investigate rather than a reason to rush.

3. Ask for the IMEI before travelling

The IMEI is one of the most useful pieces of information a seller can provide before a second-hand phone transaction.

It normally consists of 15 digits and identifies the mobile device.

Ask the seller to obtain it from the phone itself by:

• dialling *#06#;
• opening the device information in Settings;
• using the setup information screen where available.

A genuine seller may reasonably ask why you need it. Explain that you want to check the device before paying.

Why does the IMEI matter?

Mobile providers use the IMEI when identifying and blocking lost or stolen phones. Ofcom confirms that a provider can block a handset’s IMEI after it is reported missing.

Therefore, the IMEI gives you a way to investigate the physical device rather than relying only on the seller’s description.

4. Run an IMEI and blacklist check

Once you receive the number, run a device-status check before committing to the purchase.

A private buyer can use MyMobiCheck to check a single handset.

Relevant results can help identify important barred, lost, stolen or blacklist indicators before money changes hands.

5. Match the checked IMEI to the actual phone

This step is easy to miss.

A seller could send you the IMEI from a different handset with a clean history. Therefore, repeat the IMEI check when you are standing in front of the actual phone.

Compare:

• the IMEI in Settings;
• the result of *#06#;
• the number you checked beforehand;
• the box, if one is supplied;
• the receipt, if available.

What if the numbers do not match?

Do not assume immediately that the handset is stolen. Packaging can become mixed up, housings can be replaced and legitimate repairs can complicate physical labels.

Nevertheless, an unexplained mismatch deserves investigation before payment.

6. Check both IMEIs on a dual-SIM phone

Many modern phones have more than one IMEI because they support two mobile lines, often through a physical SIM and eSIM.

As a result, you may see:

• IMEI 1;
• IMEI 2.

Record both where available.

Do not assume that two IMEIs indicate cloning or tampering. Dual-SIM support is normal on many recent devices.

7. Ask whether the phone is still being financed

A phone can have a clear current blacklist status while the original seller is still making device payments.

Ask directly:

“Is there any outstanding device finance or credit agreement connected with this phone?”

If the answer is yes, ask which provider or lender is involved and request evidence of the remaining balance.

Why finance matters

The physical phone changing hands does not necessarily transfer the seller’s credit agreement to you.

Consequently, a promise such as “I will keep paying it every month” still leaves you dependent on somebody else’s future behaviour.

Where possible, a cleaner transaction is for the seller to settle the remaining device balance before completing the sale.

8. Make sure the seller can unlock the phone

Ask the seller to unlock the active screen in front of you.

If they cannot remember the PIN or password, stop there.

You need access to Settings to:

• check the IMEI;
• confirm the storage capacity;
• inspect battery information;
• test cameras and connectivity;
• review account status;
• check repair information where available.

A seller who cannot access the handset may also be unable to remove the account protection required for a safe handover.

9. Check Apple Activation Lock on an iPhone

Activation Lock is one of the most important checks when buying a used iPhone.

It is linked to Find My and helps prevent another person from activating a lost or stolen Apple device.

If you see “iPhone Locked to Owner”

Do not complete the purchase while that restriction remains.

Apple’s own second-hand iPhone guidance says not to buy an iPhone with Activation Lock enabled.

If the seller is genuine, ask them to remove the device correctly from their Apple Account.

Do not accept “I’ll remove it later”

The safest time to resolve the problem is before you hand over the money.

If the seller disappears afterwards, you may be left with an iPhone that you cannot activate.

10. Check Android FRP and previous Google accounts

Android phones use Factory Reset Protection to make unauthorised reuse more difficult after certain resets.

Therefore, a phone that has been factory reset can still request credentials linked to the previous user.

Before buying, ask the seller to:

• unlock the phone;
• remove their Google Account through Settings;
• remove manufacturer accounts where appropriate;
• erase the phone correctly;
• allow you to confirm that setup can continue normally.

Do not pay for a handset that requires unknown previous-owner credentials.

11. Look for MDM or Remote Management

Some second-hand phones originally belonged to employers, schools, public bodies or other organisations.

Those devices may remain enrolled in mobile device management, usually shortened to MDM.

Potential warning signs include:

• Remote Management during setup;
• a “managed by your organisation” message;
• a company login screen;
• work profiles;
• restricted settings;
• company apps that cannot be removed.

Why a normal home screen is not enough

Automated management can reappear after a factory reset and internet connection.

Therefore, if the phone may have belonged to a company, complete a proper setup check before paying.

12. Check whether the phone is network unlocked

Most newer handsets supplied by UK mobile operators should not present the same carrier-lock issues found on many older devices. Nevertheless, older and imported stock still exists.

Where practical, test a working SIM from your chosen network.

On a supported iPhone, you can also open:

Settings → General → About

Apple says that “No SIM restrictions” beside Network Provider Lock indicates that the iPhone is unlocked.

Remember that a network lock and an IMEI blacklist are different issues. Removing one does not clear the other.

13. Check the battery before buying

Battery condition can turn an attractive used-phone price into an expensive purchase.

For an iPhone, open the battery-health section in Settings where supported.

Look at:

• maximum capacity;
• important battery messages;
• unexpected shutdown warnings;
• whether battery information is unavailable because of an unknown component.

On Android phones, available battery information varies by manufacturer. Samsung, for example, provides diagnostic functions through Samsung Members on supported devices.

Do not judge the battery from the percentage alone

A phone showing 92% charge tells you how full the battery currently is. It does not mean that the battery retains 92% of its original capacity.

Use the relevant health information and perform a practical test where possible.

14. Look for previous repairs and replacement parts

A repaired phone is not automatically a bad purchase.

However, you should know what you are buying.

On supported iPhones, Apple provides a Parts and Service History section under:

Settings → General → About

Depending on the model and repair, this may provide information about replaced components.

Also inspect:

• screen alignment;
• gaps around the housing;
• missing or damaged screws;
• camera dust;
• uneven back panels;
• charging-port damage;
• signs of liquid exposure;
• poor-quality replacement screens.

15. Test the actual phone, not just the screen

A five-minute inspection should cover more than scrolling through the home screen.

Display

Check:

• touch response across the whole panel;
• dead pixels;
• screen burn;
• brightness;
• colour problems;
• cracks and pressure marks.

Cameras

Test every lens, not just the main camera.

Take:

• a normal photograph;
• a close-up;
• a video;
• a front-camera photograph;
• zoomed photographs where multiple cameras are fitted.

Audio

Check:

• earpiece;
• loudspeaker;
• microphones;
• volume buttons;
• vibration.

Connectivity

Also test:

• mobile signal;
• Wi-Fi;
• Bluetooth;
• NFC where practical;
• charging;
• wireless charging where supported.

16. Be careful how you pay

Payment method matters if something goes wrong later.

Meta advises users to be alert to suspicious payment requests and, when paying electronically, to access the payment provider directly rather than following unexpected links.

Before transferring money:

• finish the physical inspection;
• confirm the IMEI;
• check account locks;
• agree the final price;
• confirm what accessories are included;
• keep the Marketplace conversation.

Do not let urgency change the order

Statements such as “someone else is coming in ten minutes” or “send a deposit now and I’ll hold it” are not reasons to skip due diligence.

If the transaction cannot survive a few minutes of sensible checking, it may not be the transaction for you.

17. Get a record of exactly what you bought

For a valuable handset, keep a simple transaction record.

Include:

• seller’s name;
• date;
• make and model;
• storage capacity;
• IMEI 1;
• IMEI 2 where applicable;
• serial number where appropriate;
• price;
• payment method;
• any statement about outstanding finance;
• any faults disclosed by the seller.

Keep the Marketplace advert and conversation as well.

If the phone later develops an ownership or device-status issue, those records can help establish what was represented and which physical handset you purchased.

Private seller or business seller: why the difference matters

Not everybody selling through Facebook Marketplace is necessarily acting as a private individual.

Someone selling one old personal phone is very different from a trader regularly listing large numbers of refurbished devices.

Buying from a private seller

Your consumer protection is more limited than when buying from a business.

In particular, private sales do not give you the same broad rights simply because you later decide that the condition is disappointing.

However, the seller still should not misrepresent what is being sold.

Buying from a trader

Where the seller is genuinely acting as a business, consumer law provides stronger protections.

Therefore, look at the wider circumstances rather than relying entirely on a profile description saying “private seller”.

Should you meet at the seller’s home?

There is no single meeting location that guarantees a safe transaction.

For a high-value phone, choose a sensible environment where you can inspect the handset properly.

Useful features include:

• good lighting;
• mobile signal;
• Wi-Fi if necessary for setup;
• enough time to test the phone;
• a public or otherwise appropriate environment;
• some evidence connecting the seller with the transaction.

Do not agree to inspect an expensive phone in a dark car park while the seller rushes you.

Should you pay a deposit for a Facebook Marketplace phone?

A deposit creates an obvious risk because you are paying before you have inspected the physical handset.

There may be genuine circumstances in which buyers and sellers agree one. Nevertheless, you should understand that the seller could:

• disappear;
• send a different device;
• provide a false IMEI;
• sell the phone to somebody else;
• use photographs copied from another listing.

Where possible, complete the checks before handing over the full purchase price.

Can Marketplace photographs be trusted?

Use them as evidence, not proof.

Ask for photographs showing:

• the actual phone switched on;
• front and back;
• all four edges;
• screen condition;
• camera lenses;
• Settings showing model and storage;
• accessories included.

Ask for a specific photograph

If you are concerned that pictures have been copied from another advert, ask the seller for a new photograph showing the handset beside a simple requested object or handwritten date.

This does not prove ownership. However, it provides more confidence that the seller currently possesses the device pictured.

Watch for the “sealed brand-new phone” problem

A sealed box can appear safer because nobody has used the phone.

In reality, it can make several checks harder because you cannot inspect the physical device without opening it.

You may be unable to verify:

• the IMEI displayed by the handset;
• Activation Lock;
• screen condition;
• battery behaviour;
• whether the box contains the expected device;
• whether the phone is genuine.

Counterfeit packaging and resealing also exist. Therefore, “sealed” should not automatically be treated as “safe”.

How to spot a fake iPhone or Android phone

Counterfeit phones can mimic the appearance of popular models surprisingly well.

Before buying, compare:

• model number;
• IMEI information;
• operating system;
• camera layout;
• screen quality;
• storage shown in Settings;
• manufacturer services;
• build quality.

A device that looks like an iPhone but behaves like a heavily modified Android phone should be an immediate warning.

Similarly, do not trust a box, logo or startup screen without checking the underlying device information.

What if the seller says there is no IMEI?

A normal cellular smartphone should have an IMEI.

The seller may simply not know how to find it. In that case, explain how to use *#06# or the Settings menu.

However, be cautious if:

• the IMEI is missing from Settings;
• the number appears invalid;
• different screens show different unexplained identities;
• the seller refuses to let you inspect it;
• the handset cannot register on a mobile network.

A missing device identity can indicate a technical or hardware problem requiring professional assessment.

What if the phone was reported stolen after you bought it?

This is one reason a point-in-time check cannot guarantee the future.

A handset can be clear when you purchase it and receive a later status update.

For example, a previous owner could later report the device missing or an insurance-related record could be processed after your initial check.

Keep your evidence

Retain:

• the original advert;
• seller messages;
• IMEI-check result;
• payment evidence;
• transaction receipt;
• the seller’s details available through the platform.

If the IMEI later becomes blocked, contact your mobile provider and the seller and establish why the status changed.

What should you do if you think the Marketplace listing is a scam?

Do not continue simply because you have already spent time talking to the seller.

Meta recommends ending communication and reporting suspicious Marketplace activity through Facebook.

If you have actually lost money through fraud in England, Wales or Northern Ireland, Report Fraud is the national reporting service. In Scotland, reports should instead be made through Police Scotland where appropriate.

Keep screenshots, transaction records and seller information because they may be useful when reporting what happened.

The 60-second pre-payment check

If everything else has already been inspected, complete one final review before sending the money.

How MobiCode helps before you buy a used phone

A Marketplace advert shows you what the seller wants you to see. Device checks provide another layer of information.

• MyMobiCheck is designed for individual buyers and sellers who want to run a single-device IMEI check before a transaction.
  See: MyMobiCheck
• MobiCHECK supports professional phone shops, traders and recyclers carrying out higher-volume device due diligence.
  See: MobiCHECK
• MobiCode CHECK supports wider device-checking workflows where additional review is needed.
  See: MobiCode CHECK
• MobiCode TEST helps professional businesses run consistent functional diagnostics on used devices.
  See: MobiCode TEST

For an individual buyer, the most important principle is simple: check before you pay. Once the seller has your money, resolving a problem becomes much harder.

Common Facebook Marketplace phone-buying mistakes

• Paying because the price looks too good to miss.
• Checking the seller’s IMEI screenshot but not the actual phone.
• Assuming an unlocked phone cannot be blacklisted.
• Ignoring outstanding device finance.
• Buying an Activation Locked iPhone.
• Factory-resetting Android without handling the previous account correctly.
• Ignoring Remote Management on a former company phone.
• Testing only the screen and camera.
• Assuming a sealed box guarantees authenticity.
• Sending a deposit before seeing the handset.
• Letting the seller rush the inspection.
• Failing to keep the advert and messages.
• Checking only one IMEI on a dual-SIM phone.
• Believing a clear IMEI check proves everything about the handset.

Commercial takeaway

Buying a phone on Facebook Marketplace can be a good way to find a high-quality second-hand handset at a competitive price. However, private sales place more responsibility on the buyer to check exactly what they are purchasing.

Start before the meeting. Ask for the IMEI, check the current device status and ask whether outstanding finance remains.

Next, inspect the physical handset. Match the IMEI, make sure the seller can unlock it, check Activation Lock or FRP, look for business management and test the battery, cameras, screen, charging and mobile network.

Finally, keep a record of the transaction and do not let urgency push you into paying before the checks are complete.

A five-minute IMEI and device inspection can be far cheaper than discovering afterwards that your bargain iPhone is blocked, financed, account locked or not the phone you thought you bought.

A practical Facebook Marketplace example

A buyer finds an iPhone advertised on Facebook Marketplace for £525. The photographs look convincing, the seller has an established profile and the price is attractive without appearing impossible.

Before arranging collection, the buyer asks privately for the IMEI. The seller provides it and the buyer completes a MyMobiCheck device check.

No current lost, stolen or blacklist warning appears.

At the meeting, however, the buyer does not stop there. They dial *#06# on the physical iPhone and confirm that the IMEI matches the number checked earlier.

Next, they inspect the battery health, cameras, speakers and charging port. The phone works correctly.

The seller then mentions that they upgraded early and still have several months remaining on their device plan.

Rather than ignoring this because the IMEI check is currently clear, the buyer asks to see the finance position. A substantial device balance remains.

The parties agree that the seller will settle the remaining balance before the sale. Later, the seller provides the settlement evidence, removes their Apple Account and turns off Find My.

After another check, the buyer completes the purchase.

The IMEI check did an important job, but it did not replace the rest of the due diligence. Together, the checks turned an uncertain Marketplace listing into a much clearer transaction.

Frequently asked questions

References and further reading

• Facebook Help Centre: Buying and selling electronics on Facebook Marketplace
• Facebook Help Centre: Buy and sell responsibly on Facebook Marketplace
• Facebook Help Centre: About scams on Marketplace
• GOV.UK: Consumer products – buying second-hand goods
• Apple Support: If you want to buy a pre-owned iPhone
• Apple Support: Activation Lock for iPhone and iPad
• Apple Support: What to do before selling or trading in an iPhone
• Google Android Help: Remove an account from an Android device
• Ofcom: Lost or stolen phones and IMEI blocking
• Report Fraud: UK fraud and cyber crime reporting
• Report Fraud: Reporting cyber crime and fraud
• MyMobiCheck: Single-device IMEI check
• MobiCHECK
• MobiCode CHECK
• MobiCode TEST