I write about Android phones and carrier deals for a living, and buying used or refurbished is one of the smartest ways to get a great phone without paying flagship prices. And that's especially true since upgrading to the newest smartphone isn't very smart for most people anyway.
The key is knowing what to check before your money changes hands, because a refurbished Galaxy or Pixel from the right seller is a fantastic deal and the same model phone from the wrong seller is an expensive paperweight. A phone that's blacklisted, still financed, or locked to someone else's Google account can look perfect in the listing photos and power on just fine, and most buyers don't find out until they pop in their SIM card or try to sign in.
Used vs. refurbished Android phones: What's the difference
A used Android phone is sold as-is by its previous owner, while a refurbished Android phone has been inspected, repaired if needed, and tested by a manufacturer or professional refurbisher before it goes back on sale. The difference matters because a refurbished phone usually comes with a warranty, a minimum battery health standard, and a return window—and a used phone from a private seller usually comes with none of those.
Refurbished phones are also sorted into condition grades, and the standards behind those grades vary by seller. Here's how the major refurbished programs compare with buying from a private seller.
Refurbished Android programs compared
| Where you buy | Battery health | Coverage | Who does the work |
|---|---|---|---|
| Samsung Certified Re-Newed | Brand-new battery | One-year limited warranty, same as a new Galaxy | Samsung engineers using genuine Samsung parts |
| Amazon Renewed Premium | More than 90% | 365-day return window | Amazon-qualified refurbishers |
| Amazon Renewed | More than 80% | 90-day return window | Amazon-qualified refurbishers |
| Back Market | 80% or higher | 12-month warranty | Professional refurbishers |
| Private seller | No standard | None | No one |
A used phone from a private seller is usually the cheapest option, and it puts every check in this guide on your shoulders. A refurbished phone costs a bit more because someone else has already done most of the work and is backing it with a warranty.
6 things to check before you buy a used Android phone
Six checks protect you from these most common used Android problems:
- Stolen IMEI: Carriers block phones reported lost or stolen.
- Google account lock: Factory Reset Protection locks the phone to the previous owner's account.
- Unpaid balance: A financed phone can be blacklisted if the original owner stops paying.
- Carrier lock: A locked phone only works on the carrier that sold it.
- Expired update window: A phone past its support window stops getting security patches.
- Worn-out battery: Battery capacity drops with age and charge cycles.
The first four checks will help you decide whether the phone will work at all, and the last two help you find out how long it will keep working well.
1. Run the IMEI through a stolen phone checker
The CTIA Stolen Phone Checker is a free public service, powered by the GSMA Device Check service, that shows whether a phone has been reported lost or stolen in the U.S. Swappa also offers a free IMEI checker, and running the number through both only takes a minute or two.
The IMEI is a unique ID number assigned to every phone, and carriers use it to block phones reported lost or stolen. You can find a phone's IMEI by dialing *#06# or by checking the About phone section in the Settings app. Ask the seller for the IMEI before you meet up or pay, and walk away from any seller who refuses to share it.
What a clean IMEI check can't tell you
An IMEI checker only flags phones that have already been blocked, so a thief who sells a phone before the owner reports it stolen can pass the check. A clean result is a good sign, and it works best when you pair it with the Google account check below and a payment method that includes buyer protection.
2. Make sure the previous owner's Google account is removed
Factory Reset Protection (FRP) is an Android security feature that asks for the previous owner's Google account or screen lock after a factory reset. A factory reset doesn't remove FRP on its own because Google ties the lock to the owner's account instead of the phone's data, and removing that account turns the protection off.
Android 15 made FRP much harder to bypass by blocking new Google accounts, new screen locks, and app installs on a phone reset without the owner's permission. That's great news for theft protection and bad news for anyone who buys a locked phone hoping to get around it later. And the "FRP bypass" tools that show up in search results aren't a fix you should count on.
Testing for FRP takes about five minutes if you're buying in person. Ask the seller to remove their Google account and reset the phone in front of you, then start setup and connect to Wi-Fi. If a phone asks you to verify an account that was previously on it, FRP is still enabled. Galaxy phones can also be tied to a Samsung account, so ask the seller to sign out of that too.
3. Confirm the phone is fully paid off
A phone that's still financed through a carrier can be blacklisted after you buy it if the original owner stops making payments. Carriers can blacklist an IMEI when the attached account has an unpaid balance, and a blacklisted phone won't activate on that carrier even if the phone itself works fine. This one catches a lot of people because the phone can pass an IMEI check the day you buy it and still get blocked weeks later.
Swappa's IMEI check also confirms whether a phone is still being financed through a carrier, which makes it a useful second check alongside the CTIA tool. Ask a private seller directly whether the phone is paid off, and ask for proof like a screenshot from their carrier app showing a $0 device balance.
4. Check whether the phone is carrier locked
A carrier-locked phone only works on the carrier that sold it, so a locked Verizon phone won't work if you're on T-Mobile or AT&T. Look for the word "unlocked" in the listing, then confirm it by inserting a SIM from a different carrier and making sure the phone connects. Check the model number too, since international versions of some Galaxy phones may not support all the network bands U.S. carriers rely on.
Here's what each major carrier requires before it will unlock a phone:
- Verizon: Postpaid phones unlock automatically once they're fully paid off, but the unlock is delayed 35 days if you pay the balance online or in the My Verizon app. Prepaid phones stay locked until they've had 365 days of paid, active service.
- T-Mobile: Postpaid phones must be active on T-Mobile's network for at least 40 days, and the account holder must request the unlock. Prepaid phones need 365 days of activation, or more than $100 in refills per line and at least 14 days since purchase.
- AT&T: Postpaid phones need to have been bought more than 60 days ago and paid in full. Eligible Samsung and Google phones unlock automatically once they meet those requirements.
Unlocking a used phone often depends on the original owner's account being in good standing, so a locked phone from a stranger can be tough to unlock. Buying unlocked from the start keeps your options open, and our guide to the best unlocked phones breaks down why that flexibility matters.
5. Check how many years of updates the phone has left
Android phones get two kinds of software updates: Android version updates that add new features, and security updates that patch vulnerabilities hackers can use to get into your phone.
Security updates matter most on a used phone, because a phone that stops getting them becomes easier to hack with every month that passes. Every manufacturer counts its update window from the day a phone launched, not the day you buy it, so a used phone always has less support left than it did when it was new.
Here's when some of the most popular used Android phones stop getting support:
When popular used Android phones lose support
| Phone | Android version updates end | Security updates end |
|---|---|---|
| Google Pixel 6 and Pixel 6 Pro | October 2026 | October 2026 |
| Samsung Galaxy S23 series | 2026 | 2028 |
| Samsung Galaxy Z Fold 5 | 2026 | 2028 |
| Google Pixel 8a | 2031 | 2031 |
| Google Pixel 9 | 2031 | 2031 |
| Samsung Galaxy S24 series | 2031 | 2031 |
| Samsung Galaxy S25 series | 2032 | 2032 |
Google publishes end-of-support dates for every model on its Pixel software update page, and Samsung lists supported Galaxy models on its security updates page, so check the exact model before you buy.
6. Check battery health and test the hardware
Battery health is the most common weak spot on a used phone, because battery capacity drops a little with every charge cycle. On a Pixel 8a or newer, or a Samsung phone running One UI 7 or later, Settings > Battery shows the battery's maximum capacity as a percentage of a new battery.
Older Galaxy phones can run a battery check in the Samsung Members app, which rates the battery as Good, Normal, or Weak. Back Market and standard Amazon Renewed both require batteries at 80% or higher, and that's a good floor to hold a private seller to as well.
Spend a few minutes testing the hardware once the battery checks out. Pull up a full-screen white or gray image and look for burn-in on the screen, which shows up as faint ghost images of the navigation bar or keyboard. Make a test call to check the speaker and microphone, take a photo with every camera lens, plug in a charger to make sure the port works, and test the fingerprint sensor and every button.
Checking a used foldable phone
As a Fold owner, I'd add one more step for foldables. Open and close the phone a dozen times, listen for any grinding in the hinge, and look closely at the inner screen protector for bubbles or peeling near the crease. If you're still on the fence about going foldable, our guide on whether you should buy a foldable phone covers the tradeoffs.
Where to buy used and refurbished Android phones
The safest place to buy a used Android phone is a manufacturer refurbished program, followed by refurbished programs with long return windows and marketplaces that verify every listing before it goes live. Private local sales are the riskiest option because you have to do all the checking.
Samsung Certified Re-Newed
Samsung Certified Re-Newed is the closest you can get to a new Galaxy without paying new prices. Samsung started selling Certified Re-Newed phones on Amazon in October 2026, starting at $489 with 14 configurations across the Galaxy S24 and Galaxy S25 families. Samsung specialists service every Certified Re-Newed phone with genuine parts, including a certified new battery, and it must pass 147 quality checkpoints. The Galaxy S26 series joined the program in September and is sold only on Samsung.com, with the Galaxy S26 starting at $759.
Amazon Renewed Premium
Amazon Renewed Premium is a strong option for Pixels and other Android brands, as long as you buy the right condition tier. The Renewed Premium badge has to appear on the individual listing for Premium terms to apply, and most Amazon Renewed listings aren't Premium. Premium phones get the stricter 90% battery floor and the year-long return window, which gives you plenty of time to catch a problem.
Back Market
Back Market is a marketplace of professional refurbishers that includes a 12-month warranty on its phones. Quality can vary from one refurbisher to the next, so check the seller's rating before you buy.
Swappa
Swappa is a used phone marketplace with stricter rules than a typical classifieds site. Swappa staff reviews every listing; phones need a clean IMEI, no activation lock, and payments go through PayPal with buyer and seller protection. Swappa phones come from regular sellers rather than refurbishers, so you'll still want to run the battery and hardware checks yourself once the phone arrives.
Facebook Marketplace and Craigslist
Facebook Marketplace and Craigslist have the lowest prices and the most risk. Facebook Marketplace has no listing verification, no IMEI check, and no requirement to remove account locks before listing a phone. If you do buy locally, run every check in this guide before you pay, and meet somewhere public, like a police station's safe exchange zone. Avoid paying with Zelle, wire transfers, Cash App, or PayPal Friends and Family, because none of them offer buyer protection for goods.
Best used and refurbished Android phones to buy right now
The best used Android phones in late 2026 are recent Samsung Galaxy S and Google Pixel flagships, because they've dropped in price and still have years of updates ahead of them.
- Samsung Galaxy S24: The Galaxy S24 is the best used Android phone for most people. It's easy to find refurbished, available through Samsung Certified Re-Newed on Amazon, and it gets updates through 2031. The Galaxy S24 Ultra is the step-up pick if you want the S Pen and a bigger screen.
- Samsung Galaxy S25: The Galaxy S25 is the best refurbished Galaxy if you want a newer phone with the longest runway on this list. Its updates run until 2032, and it's also part of Samsung's Certified Re-Newed lineup on Amazon.
- Google Pixel 9: The Pixel 9 is the best used Pixel for most people. Google's seven-year update promise covers every Pixel from the Pixel 8 onward, so a Pixel 9 bought today still has years of updates left.
- Google Pixel 8a: The Pixel 8a is the best cheap used Android phone. It's covered by the same seven-year promise as the flagship Pixels, and it costs a lot less than a Pixel 9.
I'd skip the Pixel 6, Galaxy S22, and Galaxy S23 unless the price is low enough to offset the short update window. If you want to compare new options too, our list of the best Android phones covers the current lineup.
Before you settle on a used phone, check what carriers are offering on new Android phones. A trade-in or switcher deal can sometimes bring a brand-new phone close to, or even under, the price of a refurbished one.
- 6.7 inch display
- Rear Cameras: 50MP, 8MP, 2MP
- Front Camera: 13MP
- 6.7 inch display
- Rear Cameras: 50MP, 5MP, 2MP
- Front Camera: 12MP
- 6.7 inch display
- Rear Cameras: 50MP, 8MP, 5MP
- Front Camera: 12MP
Used and refurbished Android phones: FAQ
How do I check if a used Android phone is stolen?
You can check whether a used Android phone is stolen by entering its IMEI into the CTIA Stolen Phone Checker or Swappa's IMEI checker. You can find the IMEI by dialing *#06# or by checking the About phone section in Settings. A clean result only confirms the phone hasn't been reported, so you should also confirm the previous owner's Google account has been removed.
Is it better to buy a used or refurbished Android phone?
A refurbished Android phone is the better choice for most buyers because it's been inspected and tested and usually comes with a warranty, a minimum battery health standard, and a return window. A used phone from a private seller costs less, but you have to run every check yourself and usually can't return it.
Should I buy an unlocked used Android phone?
An unlocked used Android phone is the better buy for most people because it works on any compatible carrier and you won't get stuck with a phone you can't unlock. Carrier locks got stricter in 2026, and Verizon now keeps financed phones locked until they're fully paid off, so unlocking a used phone can be hard without the original owner's help.
Is it safe to use an old Android phone?
An old Android phone is safe to use as long as it's still receiving security updates from Google or the manufacturer. A phone that's past its support window can still have a long second life as a backup phone, a kid's phone, or a music player, as long as you keep sensitive activity off it. Banking and work email belong on a phone that still gets patches.
Where is the safest place to buy a used Android phone?
The safest place to buy a used Android phone is a manufacturer refurbished program like Samsung Certified Re-Newed, since those phones come with new batteries and a one-year warranty. Amazon Renewed Premium, Back Market, and Swappa are also solid options because they include buyer protection, warranties, or verified listings.
What is the best used Android phone to buy?
The Samsung Galaxy S24 is the best used Android phone for most people because it costs much less than newer flagships and still gets updates until 2031. The Google Pixel 9 is the best pick if you prefer Google's version of Android, and the Pixel 8a is the best budget option.
Scott Houghton
Jr. Staff Writer
Thousands of cell phone plans unpacked. All the facts. No surprises.
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