Buying a Used Phone? 7 Things to Check Before You Hand Over Your Money
So you’re thinking about buying a used phone. Smart move, honestly. With flagship phones costing $1,400 or more brand new in Canada, the second-hand market has never been more popular. Whether you’re browsing Facebook Marketplace, checking out Kijiji, or walking into one of those buy and sell phones shops in your neighbourhood, there’s real money to be saved here.
But here’s the thing: there’s also real money to be lost if you don’t know what you’re looking at. A cracked digitizer hiding under a screen protector, a battery that only lasts two hours, or a phone that’s locked to a carrier you don’t use… these are the kinds of surprises that turn a “great deal” into a headache real fast.
The good news? The same checks that repairs mobile phones technicians run every single day are things you can do yourself in about 10 minutes. Let’s walk through them.
1. The Phone Repair Shop Should Be Transparent About Parts
This is the obvious one, but most people don’t go deep enough. Yes, look for cracks. But also look for:
Dead pixels (small black or coloured dots that don’t change) Discolouration or yellow patches around the edges Touch responsiveness swipe across every corner, not just the middle Green or pink lines running vertically down the display
A phone with a cracked screen isn’t automatically a dealbreaker if the price reflects it. But if the seller is asking close to market value and the screen has issues, that’s a red flag. Replacing a screen at most phone shops that fix phones will run you anywhere from $80 to $350 depending on the model, so factor that into what you’re willing to pay.
2. Test the Battery Health This One Gets Overlooked Way Too Often
Battery health is where a lot of people get burned. A phone can look perfect and still have a battery that degrades within six months because it was already at 70% health when you bought it.
On iPhones, go to Settings > Battery > Battery Health. Anything below 80% means the battery is already significantly worn. On Android, it varies by brand Samsung has a built-in device care section, while for other Androids you might need a free diagnostic app like AccuBattery.
Repairs mobile phones specialists see this constantly people come in six months after buying a used phone wondering why their battery is draining so fast. Often it’s because nobody checked this before the sale.
A battery replacement typically costs $60–$120 at most mobile phone fix repair shops, so again, work that into your negotiation if the health is low.
3. Run a Full Diagnostic on the Hardware
You don’t have to be a tech person to do this. There are free apps that test everything at once. For iPhones, dialling 3001#12345# opens a field test mode. For Android phones, try apps like Phone Doctor Plus or simply search for your phone model’s built-in diagnostic code.
What you’re checking:
Speakers and microphone play a video, make a test call Camera front and back, including autofocus and flash Fingerprint sensor or Face ID Wi-Fi, Bluetooth, and GPS functionality Charging port does it charge properly or wiggle around?
Any one of these failing isn’t necessarily a dealbreaker, but it tells you exactly what you’re getting into before you pay.
4. Check for Water Damage
Most modern phones have water resistance ratings, but that doesn’t mean they’re waterproof forever, especially older used phones where the seals may have degraded.
The easiest way to check is to look at the SIM card tray. Pull it out and look inside with your phone’s flashlight. You’ll see a small white or silver square (the liquid damage indicator). If it’s pink or red, the phone has had water exposure. Game over or at minimum, major price drop time.
Water damage is one of the trickier things for mobile phone fix repair shops to deal with because the corrosion can be delayed. A phone that works fine today might start failing in components two months later.
5. Verify the IMEI and Make Sure It's Not Blacklisted
This is a big one that a lot of Canadian buyers skip and it’s completely free to check.
Every phone has a unique IMEI number. You can find it by dialling *#06#. Once you have it, run it through a site like CTIA’s stolen phone checker or use a Canadian carrier’s online IMEI checker. If the phone is blacklisted, it means it was reported stolen or the original owner stopped paying their bills. A blacklisted phone cannot be activated on any Canadian network. It’s essentially a very expensive paperweight.
If you’re buying from somewhere that claims to buy and sell phones professionally, they should have already run this check. But always verify yourself don’t take anyone’s word for it.
6. Make Sure It's Carrier Unlocked (Or Compatible With Yours)
Canada has a CRTC rule requiring all phones sold after 2017 to be unlockable for free. But that doesn’t mean every used phone you encounter is already unlocked.
Ask the seller upfront: is this phone unlocked? Then verify it yourself by inserting your own SIM card. If it connects to your network, you’re good. If it asks for an unlock code or shows “SIM not supported,” the phone is still locked.
This matters a lot if you’re on a smaller carrier like Public Mobile, Koodo, or a regional provider. A lot of people searching for where can I buy used phones don’t think about this until after the purchase and then they’re stuck either paying an unlock fee or returning a phone that may not be returnable.
7. Do a Quick Repairs and Refurbishment History Check
Ask the seller directly: has this phone been repaired? A lot of people will tell you honestly. But there are also physical signs to look for.
Check the screws at the bottom of the phone if they’re stripped or have marks around them, the phone was opened up. Look at the display for any small gaps between the screen and the frame, which often means it was replaced with a lower-quality aftermarket part. Check the camera quality against sample shots online — non-original camera glass or lens covers can noticeably reduce photo quality.
This doesn’t mean a repaired phone is bad. In fact, a phone that’s had a professional repair done at a reputable repairs mobile phones shop is often in better shape than one that’s been dropped and left alone. Just know what you’re buying.
A lot of Canadians are now choosing to buy from local phone shops that fix phones precisely because these stores often sell refurbished devices with some kind of warranty even if it’s just 30 or 60 days. That peace of mind is worth something.
Where Can I Buy Used Phones Safely in Canada?
Great question. Your options are:
Local mobile phone repair and resale shops these often carry refurbished devices with basic warranties and have already run diagnostics Facebook Marketplace and Kijiji huge selection, but zero protection if something goes wrong Carrier-certified pre-owned programs more expensive but come with warranties Swappa a peer-to-peer marketplace with built-in IMEI checking
If you’re not confident doing all these checks yourself, buying from a shop that specializes in buy and sell phones is your safest bet. You pay a little more, but you’re buying from someone who does this every day and has accountability.
Frequently Asked Questions (FAQ)
What's the most important thing to check when buying a used phone?
The IMEI blacklist check is arguably the most critical because a blacklisted phone simply won’t work on any Canadian carrier no matter how good it looks or how well everything else functions.
Can repairs mobile phones shops fix a phone before I buy it?
Yes, many phone shops that fix phones also sell refurbished devices. Some will even let you bring in a phone you’re considering buying so they can run a diagnostic on it for a small fee or sometimes for free.
How do I know if a used phone has been repaired with cheap parts?
Look for screen gaps, check screw heads for stripping marks, and test the display brightness and colour accuracy against the manufacturer’s specs. A mobile phone fix repair done with aftermarket parts often shows in the display quality.
Is it safe to buy used phones online in Canada?
It can be, especially on platforms with buyer protection. Swappa is popular among Canadians because it verifies IMEI numbers before listing. Facebook Marketplace and Kijiji are riskier to always meet in a public place and test the phone fully before paying.
What's a fair price for a used iPhone or Android in Canada?
Honestly, it depends on the model and condition, but a rough rule of thumb is expect to pay somewhere around half of what it sold for new. A phone that’s clean, fully functional, and still has decent battery health should sit in that range. If it’s got a worn battery or needs a screen fix, bring that up during negotiation. Those repairs cost real money and the price should reflect that.
Where can I buy used phones with some kind of warranty in Canada?
Your best bet is a local shop that sells refurbished devices alongside their repair work. They usually stand behind what they sell, even if it’s just a 30 or 60 day coverage. Carrier pre-owned programs are another solid option if you want something more formal. There are also online refurbishers that ship across Canada and offer return windows. Either way, always ask about the warranty before you hand over your money if a seller gets weird about that question, walk away.
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