What is a blacklisted IMEI and why does it matter in Canada?

A blacklisted IMEI means the device has been reported stolen, lost, or flagged for non-payment by a carrier — and has been blocked from connecting to Canadian wireless networks. You can check any device's IMEI for free at devicecheck.ca, which is powered by the Canadian Wireless Telecommunications Association's national registry. Buying a blacklisted phone means you cannot use it as a phone on any Canadian carrier, regardless of which SIM you insert. Always run this check before any private pre-owned phone purchase.

How do I check battery health on a pre-owned iPhone?

On any iPhone running iOS 11.3 or later — which includes the iPhone 7, 7 Plus, 8, 8 Plus, X, and XR — go to Settings → Battery → Battery Health & Charging. The maximum capacity percentage shown tells you how much of the original battery capacity remains. A result of 80% or above is generally considered acceptable, while anything below 80% may affect performance and is worth factoring into your decision or negotiation.

What is the difference between a phone's condition grade and this inspection checklist?

Condition grades — Excellent, Good, and Fair — describe the cosmetic state of a device: scratches, scuffs, screen wear, and physical appearance. This checklist, by contrast, is about functional verification: confirming the IMEI is clean, the battery holds a charge, the screen has no dead zones, the cameras focus correctly, and the software isn't locked down by a corporate profile. Both matter, but they answer different questions. For a full explanation of what each grade means visually, see our guide to pre-owned phone grades explained.

What is iCloud Activation Lock and how do I check for it?

iCloud Activation Lock is Apple's security feature that ties a device to an Apple ID. If the previous owner did not sign out of their Apple ID before selling, the phone cannot be set up as new — it will ask for the original owner's credentials at the setup screen, making it effectively unusable to you. Before buying any pre-owned iPhone, go to Settings and confirm the previous Apple ID has been removed, or ask the seller to sign out in front of you. A legitimate seller with nothing to hide will have no problem doing this.

Does BestMobileCanada's pre-owned phones come with a warranty?

Yes. Every pre-owned phone sold by BestMobileCanada comes with a 3-month warranty. This covers you if a functional issue surfaces after purchase — something that private sales simply cannot offer. You can review the full warranty terms on the warranty page of the website.

What should I look for when testing the screen on a pre-owned iPhone X?

The iPhone X uses an OLED display, which can develop burn-in over time — ghost images of previous content permanently visible on the panel. To check for this, display a solid white or light grey image and look carefully for faint outlines of icons or a keyboard. You should also test touch responsiveness across the entire surface, including all four corners and the very bottom edge, since swipe-up navigation on the iPhone X relies on that area. Any dead zones or unresponsive strips are a reason to walk away.

Buying Guide

Pre-Owned Phone Checklist: IMEI, Battery & Screen Before You Buy

By BestMobileCanada Editorial · Published May 31, 2026

Why Every Pre-Owned Phone Buyer Needs a Checklist

You've found a listing that looks promising — a reasonably priced iPhone X or an iPhone XR in decent shape. Before you hand over a single dollar, there's a set of checks every smart buyer should run. A pre-owned phone that hasn't been properly verified can carry hidden problems: a blacklisted IMEI that won't connect to any Canadian carrier, a battery barely holding a charge, or a screen with touch-dead zones invisible in photos.

This checklist exists to protect you. Work through it methodically, whether you're buying privately or just want to understand what a rigorous inspection looks like. And if you'd rather skip the legwork entirely, browse our full pre-owned catalog — every device has already been tested against these exact points before it ever reaches you.

> Important distinction: This guide is about *verification* — confirming a device works as expected and is legally usable in Canada. If you want to understand what the condition grades Excellent, Good, and Fair actually mean visually, read our companion article on pre-owned phone grades explained. Grades describe cosmetics; this checklist describes function.

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Step 1: Verify the IMEI — The Most Critical Check

The IMEI (International Mobile Equipment Identity) is a 15-digit number unique to every phone. It is the single most important thing to verify before purchasing any pre-owned phone, because a blacklisted IMEI means the device is locked out of Canadian carrier networks — permanently, until the original owner resolves whatever flagged it (theft, non-payment, insurance fraud).

How to Find the IMEI

**Dial \*#06#** on the phone's keypad — the IMEI appears on screen immediately.
On iPhones (iPhone 7 and later), go to Settings → General → About and scroll to IMEI.
Check the physical SIM tray — Apple prints the IMEI on it for most models.
For iPhone 8, iPhone 8 Plus, iPhone X, and iPhone XR, the IMEI is also engraved on the back of the device.

Cross-reference all three sources. If any number doesn't match, walk away.

Check the IMEI Against Canada's National Blacklist

Canada operates a national stolen device database managed by the Canadian Wireless Telecommunications Association (CWTA). You can check any device's status for free at:

[protectyourdata.ca](https://www.protectyourdata.ca) — the CWTA's consumer-facing portal
[devicecheck.ca](https://www.devicecheck.ca) — the direct IMEI check tool powered by the national registry

Enter the IMEI and the tool will tell you whether the device is clean, reported stolen, or blacklisted by a carrier. A clean result is a hard requirement — not a nice-to-have.

Additional IMEI Checks Worth Running

Carrier lock status: Ask the seller whether the device is unlocked or locked to a specific carrier. An iPhone 7 or iPhone 7 Plus locked to one carrier will not work on another network without official unlocking.
Activation Lock (iCloud Lock): On any iPhone, go to Settings → [Your Name]. If the previous owner's Apple ID is still signed in, the device cannot be set up as new until they remove it remotely. A device still tied to someone else's Apple ID is essentially unusable for you. You can also check at iforgot.apple.com or ask the seller to show Settings while in your presence.

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Step 2: Battery Health

Battery degradation is one of the most common hidden costs in private pre-owned phone sales — and one of the easiest to miss if you only look at the screen.

Check Battery Health on iPhone

On iPhones running iOS 11.3 or later (which covers the iPhone 7, 7 Plus, 8, 8 Plus, X, XR, and beyond):

Go to Settings → Battery → Battery Health & Charging
The maximum capacity percentage is shown. Apple considers 80% the threshold below which performance management kicks in.

What to look for:

90–100%: Excellent — the battery has seen minimal use.
80–89%: Acceptable for most buyers, but factor in that replacement may be on the horizon.
Below 80%: Unless the price reflects this significantly, consider it a red flag or a negotiation point.

Also check whether the "Peak Performance Capability" message reads normal or whether it indicates the battery has triggered throttling. A degraded battery on an iPhone X or iPhone XR can noticeably impact everyday performance, even if the phone otherwise runs fine.

Physical Battery Signs to Watch For

Swollen back glass or a screen that appears lifted at the edges: On sealed-body phones like the iPhone 8 series and iPhone X, a swollen battery will push the display out from the frame. Do not buy a device showing this symptom.
Rapid drain during testing: Ask to use the phone normally for a few minutes. If the battery percentage drops noticeably fast, that's a practical signal the health percentage may not tell the whole story.

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Step 3: Screen Test

The display is the surface you interact with hundreds of times a day. A screen problem that's invisible in photos can be genuinely debilitating in daily use.

Visual Inspection

Test in a bright environment and a dim one. Bright light can reveal pressure spots, discolouration patches, or burns.
Check all four corners and edges — dead zones often appear at the margins.
Look at the screen at a steep angle. LCD screens (used in the iPhone 7, 7 Plus, 8, 8 Plus, and XR) can show yellowing or banding at angles that isn't visible straight-on.
OLED screens (iPhone X) can develop burn-in. Display a solid grey or white image and look for ghost images from previous content.

Touch Responsiveness

Open the Notes app or a drawing app and scribble across the entire screen surface. Every part of the display should register your input equally.
Swipe from every edge, corner, and the very bottom. On the iPhone X, swipe gestures from the bottom edge are core to navigation — a dead strip there makes the phone frustrating to use.
Test multi-touch: pinch to zoom in Maps or Photos.

Display Brightness and Auto-Brightness

Max out brightness and confirm it's actually bright. Then enable auto-brightness (Settings → Accessibility → Display & Text Size) and cover the ambient light sensor — brightness should drop. If it doesn't respond, the sensor may be damaged.

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Step 4: Cameras — Front and Rear

Camera modules are expensive to replace privately, and sellers don't always disclose issues.

Open the native Camera app. Test the rear camera at 1x and any optical zoom levels the model supports.
Check for autofocus: tap different areas of the frame and confirm the lens hunts and locks quickly.
Look through the lens before shooting — dust inside the module, scratches on the glass, or fogging will be visible.
Test the front-facing camera. On Face ID models like the iPhone X, also verify Face ID works from the lock screen.
Record a short video and play it back. Look for focusing glitches, audio sync issues, or stabilisation problems.
Test the flash: take a photo in a dark room with the flash on.

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Step 5: Connectivity — SIM, Wi-Fi, Bluetooth, and Cellular

SIM and Cellular

Insert your own SIM card and confirm the phone registers on your carrier's network and makes a call.
Send and receive a text message.
Confirm LTE or 5G (depending on model) connects and loads a webpage.

Wi-Fi and Bluetooth

Connect to a Wi-Fi network and confirm stable, fast browsing. Weak Wi-Fi signal even close to the router can indicate a damaged antenna — particularly relevant on the iPhone 7 series which had antenna band redesigns.
Pair a Bluetooth device (headphones or another phone) and confirm audio transmits cleanly.

Other Connectivity

Test NFC if the device supports it (Apple Pay in Wallet is a quick check).
Check GPS by opening Maps and confirming the blue dot locks onto your actual location within a reasonable time.

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Step 6: Ports and Biometrics

Charging Port

Plug in a cable and confirm it charges. Wiggle the cable gently — a very loose connection can indicate a worn port. On the iPhone 8, 8 Plus, X, and XR, wireless (Qi) charging is supported; test that separately with a wireless pad if one is available.

Speakers and Microphone

Play audio through the bottom speaker and confirm it's clear, undistorted, and at full volume.
Make a call and test the earpiece speaker.
Record a voice memo and play it back to confirm the microphone captures audio cleanly.

Physical Buttons

Press every button deliberately:

Volume Up / Volume Down
Side/Power button (also tests auto-lock)
Mute/Ring switch (iPhone)
Home button with Touch ID (iPhone 7, 7 Plus, 8, 8 Plus) — confirm fingerprint recognition works

Headphone Jack

The iPhone 7, 7 Plus, and all later models removed the 3.5 mm headphone jack. If buying an iPhone 6s or earlier, plug in headphones and confirm both channels play audio.

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Step 7: Software and Activation

Confirm the phone is running a current or near-current version of iOS. Old software can be a sign the previous owner couldn't update — which can indicate activation issues or a managed/supervised device.
Go to Settings → General → VPN & Device Management: there should be no corporate MDM profile installed. An MDM profile means an employer or school has management rights over the device — this cannot always be removed by the buyer.
Confirm there are no parental control restrictions that limit functionality.
Sign in with your own Apple ID and confirm the App Store loads and downloads an app.

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The Case for Buying From a Wholesaler That Already Did All This

Running through this entire checklist privately is genuinely time-consuming. It requires meeting a stranger, bringing your own SIM card, knowing what to look for on every screen, and still accepting residual risk if you miss something — or if the seller is deceptive.

BestMobileCanada is a Canadian retailer with direct-wholesale sourcing. Every device in the catalog — whether it's an iPhone 7, an iPhone 8 Plus, or an iPhone XR — has been tested against the functional checks described in this article before it is listed. You're not buying someone's private guess about condition; you're buying a device that has passed inspection, assigned an accurate condition grade, and is backed by a 3-month warranty.

That warranty matters. If something surfaces in the first three months — a battery failing faster than expected, a camera issue that wasn't visible at purchase — you have documented recourse. Private sales offer no such protection.

Explore our pre-owned iPhones and see the current prices across all available grades and models.

If you're also considering Android devices, the same tested-and-graded standard applies to pre-owned Samsung Galaxy phones and pre-owned Google Pixel phones in the catalog.

Not sure which model is right for you? Use the side-by-side phone comparison tool to put two models against each other across the specs that matter to you.

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Checklist Quick-Reference Summary

Use this as a fast-reference before any private purchase:

IMEI & Legal Status

[ ] IMEI matches on dialpad, settings, and physical engraving
[ ] IMEI passes the check at devicecheck.ca
[ ] No iCloud/Activation Lock tied to a previous Apple ID
[ ] Carrier lock status confirmed and matches your needs

Battery

[ ] Battery health at 80% or above (iOS Battery settings)
[ ] No physical swelling visible
[ ] Charge level holds during testing

Screen

[ ] No dead touch zones across the full surface
[ ] No burn-in, pressure spots, or discolouration
[ ] All edge/corner swipe gestures functional

Cameras

[ ] Rear and front cameras focus and shoot correctly
[ ] No dust, fogging, or lens scratches
[ ] Flash functional
[ ] Face ID / Touch ID working

Connectivity

[ ] SIM registers on carrier, calls and texts work
[ ] Wi-Fi connects and loads pages reliably
[ ] Bluetooth pairs successfully

Ports & Buttons

[ ] Charging port charges firmly
[ ] All physical buttons respond
[ ] Speakers and microphone clear

Software

[ ] No MDM/corporate management profile
[ ] iOS up to date or updateable
[ ] No parental control restrictions

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Verdict: Know the Checklist, Then Decide Where to Buy

Running this checklist privately is absolutely worthwhile if you go that route — it will catch most problems before money changes hands. But it asks a lot of you: time, knowledge, your own SIM card, and a tolerance for uncertainty even after a thorough check.

The alternative is a pre-owned phone that has already been through this process by people who do it professionally, graded honestly, and backed by a warranty you can actually rely on. For most buyers, that peace of mind is worth the difference.

Read our complete buyer's guide to pre-owned phones in Canada for more on what to expect from the market, what models offer the best value, and how to find the right device for your needs. When you're ready, browse all pre-owned phones to find a verified, tested device at a price that makes sense.

Frequently Asked Questions

What is a blacklisted IMEI and why does it matter in Canada?: A blacklisted IMEI means the device has been reported stolen, lost, or flagged for non-payment by a carrier — and has been blocked from connecting to Canadian wireless networks. You can check any device's IMEI for free at devicecheck.ca, which is powered by the Canadian Wireless Telecommunications Association's national registry. Buying a blacklisted phone means you cannot use it as a phone on any Canadian carrier, regardless of which SIM you insert. Always run this check before any private pre-owned phone purchase.
How do I check battery health on a pre-owned iPhone?: On any iPhone running iOS 11.3 or later — which includes the iPhone 7, 7 Plus, 8, 8 Plus, X, and XR — go to Settings → Battery → Battery Health & Charging. The maximum capacity percentage shown tells you how much of the original battery capacity remains. A result of 80% or above is generally considered acceptable, while anything below 80% may affect performance and is worth factoring into your decision or negotiation.
What is the difference between a phone's condition grade and this inspection checklist?: Condition grades — Excellent, Good, and Fair — describe the cosmetic state of a device: scratches, scuffs, screen wear, and physical appearance. This checklist, by contrast, is about functional verification: confirming the IMEI is clean, the battery holds a charge, the screen has no dead zones, the cameras focus correctly, and the software isn't locked down by a corporate profile. Both matter, but they answer different questions. For a full explanation of what each grade means visually, see our guide to pre-owned phone grades explained.
What is iCloud Activation Lock and how do I check for it?: iCloud Activation Lock is Apple's security feature that ties a device to an Apple ID. If the previous owner did not sign out of their Apple ID before selling, the phone cannot be set up as new — it will ask for the original owner's credentials at the setup screen, making it effectively unusable to you. Before buying any pre-owned iPhone, go to Settings and confirm the previous Apple ID has been removed, or ask the seller to sign out in front of you. A legitimate seller with nothing to hide will have no problem doing this.
Does BestMobileCanada's pre-owned phones come with a warranty?: Yes. Every pre-owned phone sold by BestMobileCanada comes with a 3-month warranty. This covers you if a functional issue surfaces after purchase — something that private sales simply cannot offer. You can review the full warranty terms on the warranty page of the website.
What should I look for when testing the screen on a pre-owned iPhone X?: The iPhone X uses an OLED display, which can develop burn-in over time — ghost images of previous content permanently visible on the panel. To check for this, display a solid white or light grey image and look carefully for faint outlines of icons or a keyboard. You should also test touch responsiveness across the entire surface, including all four corners and the very bottom edge, since swipe-up navigation on the iPhone X relies on that area. Any dead zones or unresponsive strips are a reason to walk away.