Samsung
Galaxy S21 Ultra, 5G
Test score
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Brand new, top-of-the-line smartphones aren't always an option for buyers on a budget. Hefty price tags and underwhelming advancements between models have seen many consumers turn their back on the conventional smartphone upgrade cycle.
Take the prices of modern phones into account, and it's not difficult to see why. Some of the latest models cost upwards of £1,000, but why pay out for a new device that won't offer a lot of advantages over your current handset?
Buying a used mobile phone could make perfect sense, but it's important to understand exactly what you're getting into first – and to consider important issues like security. Our expert guide explains how to find the perfect second-hand phone for you.
To find out which smartphones have scored top marks in our rigorous lab tests, consult our guide to the best mobile phones.
One of the most important things to consider when buying a second-hand or refurbished phone is security. Apple's iPhone models tend to receive security updates from the manufacturer for 5-6 years from launch. For Android phones, this is usually between 2-4 years, though there are exceptions.
Once a phone stops receiving crucial security updates, it'll be more vulnerable to attacks from data-grabbing hackers. We clearly flag in our expert mobile phone reviews if a phone is no longer supported, as shown in the example below:
If you're buying a phone second -hand, you'll want to make sure it will be updated for a good amount of time. Since smartphone update periods begin at launch, it can be a bit of a minefield.
Fortunately, we can help. Use our mobile phone security support tool to find out if a model you own, or are thinking of buying, is still getting updates. We'll also give you an estimated remaining support period, after which the clock is ticking as to when updates will stop.
It can be easy to confuse the two, but there are key distinctions to be made, with each one having its own set of pros and cons.
These are sold directly from a manufacturer, retailer or reseller. Refurbished phones will either look 'as-new' or be graded by quality (details on that below), so you know what condition the phone will be in before you buy.
Prices will often be higher than on the second-hand market, as the phones have been checked over by professionals to ensure they're in working order and good physical condition. You're guaranteed a warranty of some sort, as refurbished phones are sold to you by a professional retailer.
These are often purchased directly from the previous owner, meaning that transactions can be riskier. Remember that the warranty is likely to have expired, as there's no renewal when a phone changes hands between owners directly.
You can get a great price on a used phone, as sellers may not know how much a used handset is truly worth. Online auctions often result in low final prices too.
But be warned – the handset may well look visibly worn, and it may not come in its original box or even with the correct accessories such as a charger or headphones.
Find out more about your rights when buying second-hand goods.
Some sellers of used smartphones have a grading system to help potential buyers know what level of quality to expect from the phone. While they vary between merchants, here's a general overview of what you can expect:
Even with these grades in mind, it's important to understand exactly what you're buying with a second-hand or refurbished phone. Look for additional details on a product listing so you understand the specifics about any potential issues a phone might have.
The amount of money you'll receive for your smartphone is based on several factors. The condition of the device has an impact, as does the amount of internal storage. For example, a working 128GB iPhone XR is more desirable than a working 64GB iPhone XR.
Unlocked phones (phones that aren't tied to a specific carrier) are generally worth more money than mobiles tied to a network.
Below, we've picked out four popular smartphones released over the last four years. Take a look at our table to see how much you can expect to receive for each of these used mobiles in 2022.
Launch price | musicMagpie value | CeX value | WeBuyAnyPhone value | Envirofone value | Fonebank value | |
Samsung Galaxy S21 5G (128GB) | £769 (January 2021) | £350 | £250 | £365 | £370 | £300 |
Apple iPhone 12 (64GB) | £699 (October 2020) | £391 | £288 | £400 | £370 | £350 |
Samsung Galaxy S10 5G (256GB) | £1,099 (June 2019) | £160 | £151 | £135 | £160 | £130 |
Apple iPhone XR (64GB) | £749 (October 2018) | £166 | £135 | £178 | £155 | £160 |
Prices above relate to unlocked mobiles in working condition (or Grade B at CeX). Highest valuation from second-hand phone websites highlighted in green. Correct as of 28 January 2022. |
Let's focus on the most recently released phone of the four above, the Samsung Galaxy S21 5G. We can see that, although the mobile retailed at £769 last year, it's not worth nearly that much if you sell it as a used handset.
The best valuation for a used Galaxy S21 5G was around £370, which is £399 down from retail. Still, on the plus side, that's money you can put towards your next mobile phone.
Our experts can help you find top bargains on the latest smartphones. For the details, see our guide on the best mobile phone deals.
In some cases, handing your used phone back to the manufacturer means you'll get credit that can be put towards a future purchase from the same brand. Both Apple and Samsung have schemes in place just like this.
If you think it's time to retire your iPhone, Apple can take your device and swap it for credit towards your next purchase, or offer an Apple Store Gift Card for use at any time. If your device isn't eligible (perhaps it's damaged beyond repair), Apple will recycle it for you.
You'll be provided with a quote for your old device. The Apple Trade In website has a list of price estimates for iPhone models from the iPhone SE (1st generation) to the iPhone 11 Pro Max. You can expect to receive anywhere between £35 and £610 for your gadget. Apple says you'll receive 'up to £190' for the iPhone XR.
You can return your old device using a pre-paid trade-in kit that Apple sends, or you can take the product in-store. Apple says the online trade in process generally takes 2-3 weeks.
If you're getting rid of a Samsung mobile (or a non-Samsung phone that you're replacing with a Samsung device), head to the brand's website and find out the current value of your handset. If you're willing to accept the quote, you'll get an instant discount on your shopping basket when you select your trade-in device. The final step involves shipping off your phone in the packaging provided by Samsung.
So how much can you expect to receive for your used phone? The Samsung Trade In website has all the details on phones that qualify for the scheme, which includes the Galaxy Note 10 Plus 5G. Trade in the Note 10 Plus 5G and you can purchase the Galaxy Z Flip3 5G for £689.
Assuming you've decided to list your old mobile, there are a couple of steps to run through before you box it up.
If you've owned your soon-to-be-retired phone for a number of years, there's a good chance you'll have pictures, videos and other files on there that you'd like to have a copy of. Backing up your data is fairly straightforward, but the steps vary slightly depending on your phone model.
Note that both Google and Apple will automatically back up lots of your information on a regular basis if you have this feature enabled – it could offer peace of mind if you're worried about losing your phone.
The majority of phones now have a pre-installed switching app, which lets you move across your old files to your replacement handset. If you decide to use this method, we suggest holding on to your old phone for a week or so just so you have time to ensure everything is moved across.
Once you're certain all of the important files have been removed from your phone and backed up elsewhere, you're ready to tap the 'factory reset' option.
Running a factory reset will revert your phone back to the way it was when you first unboxed it. That means the only files kept on the mobile will be vital OS files and pre-installed apps and images. Running through this process will give you peace of mind when it comes to selling – you'll be handing over a phone that has none of your personal information on it.
One of the big perks of buying a brand new handset, either outright or on contract, is that you receive both a retailer and manufacturer warranty as standard. When you buy second-hand or refurbished, things can work a little differently.
If you buy a handset either second-hand or refurbished from a retailer (such as Apple or CeX), your consumer rights are very similar to if the handset was brand new.
You receive whatever sort of warranty the retailer offers as standard, plus basic protection from the Consumer Rights Act 2015. You still have a 30-day right to reject if the phone isn't as described, fit for purpose or of satisfactory quality. If you discover a fault within the first six months, it is up to the retailer to prove it wasn't there at the point of sale.
You also may be covered by the manufacturer warranty, even if you are not the original owner. Manufacturer warranties do not renew when the item changes hands.
Buying from a private seller (as you would do on eBay, for example) leaves you less protected. The manufacturer warranty still applies, as above, but your consumer rights are slightly different.
The item you receive must still be as described to you by the seller – so a handset listed as 'new', for example, must be genuinely unused. The seller doesn't have to disclose faults, but they aren't allowed to misrepresent it, either. This creates a fine line: a handset that doesn't turn on cannot be listed as 'working', but it doesn't have to be listed as 'not working', either. Always be sure to ask the seller questions if you have any doubts.
You will not receive protection from the Consumer Rights Act 2015, so the six-month return window does not apply.
There are plenty of ways to get a bargain price on your next handset without having to take risks or compromise on quality.
When you're shopping online for a replacement phone, make sure you’re handing over your money to a reputable seller. If possible, check the retailer's returns policy and also have a look at some customer reviews.
Popular retailers that stock second-hand phones include:
In addition to these, most major UK networks will also have deals on refurbished handsets – but note that you'll be tied into a contract with that network.
Find out the retailers that are rated highly by Which? members with our expert guide on the best and worst shops.
You're likely to have fewer issues if you stick to reputable phone resellers rather than buying from an individual, but it's still important to do your research carefully.
As well as the security issues mentioned above, here are some other problems to look out for: