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how to check if your refurbished phone is unlocked
Tech
28/04/2026

Before I buy or after I receive a refurbished phone, how do I know it is unlocked?

Learn how to check if your refurbished phone is unlocked in the UK. Simple SIM, iPhone, Samsung, and IMEI methods before buying.

If you want to check if your refurbished phone is unlocked, there are a few simple methods you can use before or after buying. The quickest way is to insert a SIM card from a different UK network and see if the phone connects. You can also check iPhone or Android settings to confirm.

For UK buyers, this step is important when purchasing refurbished devices, as an unlocked phone gives you the freedom to use any network like EE, O2, Vodafone, or Three. In this guide, we’ll walk you through every method in detail so you can buy with confidence.

Quick Answer: How to Check If Your Refurbished Phone Is Unlocked

  • Insert a SIM card from a different network

  • Restart the phone and check for signal

  • On iPhone: Settings → General → About → Network Provider Lock

  • On Android/Samsung: Check mobile network settings

  • Use IMEI check tools if needed

If the phone connects to another network without issues, it is unlocked.

Key Takeaways

  • The easiest way to check if a refurbished phone is unlocked is using another SIM

  • iPhones show unlock status directly in settings

  • Android and Samsung phones require network checks

  • Not all refurbished phones are automatically unlocked

  • UK network compatibility is important

  • Buying from trusted sellers like Zextons reduces risk

What Does an Unlocked Refurbished Phone Mean?

An unlocked phone is not restricted to a specific network. This means you can insert any SIM card and use it without limitations.

A refurbished phone is a pre-owned device that has been professionally tested, repaired if needed, and restored to full working condition.

You may also see terms like:

  • SIM-free phone

  • carrier locked phone

  • network locked device

In the UK, “SIM-free” and “unlocked” usually mean the same thing.

Why It’s Important to Check If a Refurbished Phone Is Unlocked

Before buying, always check if your refurbished phone is unlocked because:

  • You can use any UK network (EE, O2, Vodafone, Three)

  • You avoid being tied to one provider

  • It improves resale value

  • It allows easy switching to cheaper SIM-only deals

  • It’s ideal for travel with local SIM cards

How to Check If Your Refurbished Phone Is Unlocked

1. Try a SIM Card from Another UK Network

This is the simplest and most reliable method.

Steps:

  • Insert a SIM from a different network

  • Restart your phone

  • Try making a call or using mobile data

If it works, your phone is unlocked.

Tip: Use SIMs from different networks (e.g. Vodafone vs O2). Some providers like Giffgaff use O2, so they may not fully test unlock status.

2. How to Check If an iPhone Is Unlocked

Apple makes it easy to check:

  • Go to Settings

  • Tap General

  • Tap About

  • Look for Network Provider Lock

If it says “No SIM restrictions”, your iPhone is unlocked.

3. How to Check If a Samsung Phone Is Unlocked

For Samsung devices:

  • Open Settings

  • Go to Connections

  • Tap Mobile Networks

  • Select Network Operators

If multiple networks appear, your phone is likely unlocked.

4. How to Check If an Android Phone Is Unlocked

For other Android phones:

  • Go to Settings

  • Tap Network & Internet

  • Select Mobile Network

  • Try selecting different networks

If you can switch networks, your phone is unlocked.

5. Check Using the IMEI Number (With Caution)

You can also check using IMEI:

  • Dial *#06#

  • Copy your IMEI number

  • Use trusted IMEI checking services

Be careful: some free IMEI tools are unreliable. Always double-check results.

6. Ask the Seller Before Buying

If you haven’t purchased yet:

Look for terms like:

  • “Fully unlocked”

  • “SIM-free”

  • “Factory unlocked”

If unclear, always ask the seller directly.

SIM-Free vs Unlocked: Are They the Same?

In the UK, SIM-free and unlocked usually mean the same thing.

Both indicate:

  • No network restrictions

  • Works with any SIM card

However, always confirm in the product description to avoid confusion.

Are All Refurbished Phones Unlocked in the UK?

No, not all refurbished phones are unlocked.

Some may still be:

  • Locked to a network

  • Previously tied to contracts

  • Sold through carriers

That’s why checking before buying is essential.

What to Do If Your Refurbished Phone Is Locked

If your phone is locked:

  • Contact the original network provider

  • Request an unlock (often free in the UK)

  • Wait for confirmation

  • Restart the device

If recently purchased, you can also return or exchange it.

Can You Use Any SIM in an Unlocked Refurbished Phone?

Yes — in the UK, an unlocked refurbished phone works with:

  • EE

  • O2

  • Vodafone

  • Three

  • Tesco Mobile

  • Giffgaff

  • Sky Mobile

  • VOXI

  • Lebara

  • Lyca

For international use, check compatibility with local networks.

Buyer Checklist Before Buying an Unlocked Refurbished Phone

Before purchasing, make sure to:

  • Confirm the phone is unlocked

  • Check network compatibility

  • Review warranty coverage

  • Understand grading condition

  • Check return policy

  • Buy from a trusted UK seller

Why Buy an Unlocked Refurbished Phone from Zextons?

At Zextons, we make buying refurbished phones simple and reliable.

  • Professionally tested devices

  • Clear unlocked/SIM-free listings

  • UK-focused refurbished phone store

  • Warranty support for peace of mind

  • Competitive pricing across iPhone, Samsung, and more

If you’re looking for a device that works seamlessly with your preferred network, Zextons offers a trusted solution.

FAQs

Are refurbished phones unlocked?

Not always. Some are locked, so always check before buying.

How do I check if my iPhone is unlocked?

Go to Settings → General → About → Network Provider Lock.

How do I check if my Samsung phone is unlocked?

Check network settings or insert another SIM.

Can refurbished phones be locked?

Yes, especially if they were previously tied to a network.

Is SIM-free the same as unlocked?

In the UK, yes — both usually mean the phone works with any SIM.

Can I use any SIM in a refurbished phone?

Yes, if it is unlocked.

What happens if I buy a locked phone?

You’ll need to contact the network or return the device.

Do Zextons refurbished phones come unlocked?

Most listings clearly state unlock status, so you can buy with confidence.



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