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Best mobile phone and Sim-only March deals 2024

Our experts have picked the best contract and Sim-only deals, and tell you how to bag a bargain on an Android handset or iPhone
Which?Editorial team
Mobile phone and sim-only deals this Black Friday

With new smartphones launching every week, and stiff competition between the biggest manufacturers and contract providers, you can often find deals on even the most expensive handsets – including ones from iPhone and Samsung. 

Whether you choose a pay-as-you-go (PAYG) or a Sim-free deal, or you want a cheap contract to buy a handset now, we've rounded up some of the best deals on the latest handsets.

Compare mobile phone and Sim-only deals today

Get a great deal on a mobile phone contract, or browse Sim-only deals starting from around just £5 a month

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Best Android phone deals

There are a number of attractive discounts on Android handsets, so you don't need to spend a fortune on a big brand.

Our pick: Google Pixel 7 Pro

Google Pixel 7 Pro
  • Google Tensor G2 processor
  • 6.7-inch QHD+ display
  • Three rear cameras with telephoto lens

We like: Lovely screen

We don’t like: No quick charging

The highest-spec Google phone from 2022 still has superb features by 2024 standards. The quality of its large screen is excellent with a 120Hz refresh rate, plus Google says it's 25% brighter than on the Pixel 6 Pro. The cameras have an array of editing tools to make shots look picture perfect before sharing with friends and family. It is guaranteed security updates until at least October 2027.

Check prices below, compare contract deals and read our full Google Pixel 7 Pro review.


For deals on the Google Pixel 7 Pro and more, check out the best deals in the Amazon Spring sale 2024.


Samsung Galaxy A54 5G

Samsung Galaxy A54 5G
  • Exynos 1380 chipset and support for Wi-Fi 6
  • 6.4-inch AMOLED display
  • Three rear cameras

We like Long battery life, bright screen

We don’t like No wireless charging

This is a high-spec Samsung Galaxy phone from its A-range in 2023, which aims to combine performance with more affordable prices. Its display is a decent size, with a high 120Hz refresh rate to keep content loading quickly for smooth browsing. The main camera has a high resolution and IP67 certification, which means it should be dust-resistant and survive 30 minutes in water to a depth of one metre.

Check prices below, compare contract deals and read our full Samsung Galaxy A54 5G review.

Samsung Galaxy Z Fold5

Samsung Galaxy Z Fold5
  • Two AMOLED screens
  • 12GB of Ram
  • 1TB of internal storage

We like: Foldable design, IPX8 certification

We don’t like: Folding screens are vulnerable to scratches

This is Samsung’s fifth generation of premium-priced foldable phone. The outside screen is 6.2 inches and, when unfolded, it combines with a second to form a 7.6-inch display. It has a three-lens system on the back, with 50Mp wide, 10Mp telephoto and 12Mp ultra-wide sensors. There are two front-facing lenses, a 4Mp under-display camera and a 10Mp camera on the folded cover display.

To see if this shapeshifting mobile is worth grabbing, read our Samsung Galaxy Z Fold5 review.

Samsung Galaxy S23

Samsung Galaxy S23
  • 6.1-inch AMOLED display
  • 128GB of internal storage
  • Dual SIM

We like: Impressive specifications, plenty of customisation options

We don’t like: Charging speed could be better

The standard model in Samsung’s 2023 flagship range has been discounted for the Amazon Spring Sale. This smartphone is the smallest of three models in this range and features an upgraded Qualcomm Snapdragon 8 Gen 2 chipset, which Samsung claims will unlock higher frame rates and sharper, more vivid graphics. As it's a newer phone, you should expect security updates for the next four years.

See how this mobile performs in our Samsung Galaxy S23 review.

Oppo Find X5

Oppo Find X5
  • Eight-core Qualcomm Snapdragon 888 Mobile Platform processor
  • 6.6-inch OLED display
  • Triple rear cameras

We like: Quick processor

We don’t like: No formal IP water-resistance rating

The phone’s build is distinctively curved, with a noticeable bulge where the cameras are positioned. It's well-equipped with a high-resolution screen, premium processor and large battery. It's not new but you should be able to keep it secure for around two years, based on our prediction that it will lose security updates in March 2026. 

Check retailers below for the latest prices and read our full Oppo Find X5 review.


Samsung's latest model, the S24, is out now – check out the best Galaxy S24 deals.


Motorola Moto G13

Motorola Moto G13
  • Mediatek Helio G85 processor paired with 8GB of Ram
  • 6.5-inch LCD display
  • Three rear cameras

We like: Easy to use, solid battery life

We don’t like: No 5G, slow processor

If you want a basic phone at a low price, the Motorola Moto G13 could be just the ticket. Its screen has a lower resolution than we'd like (720 x 1,600 pixels), but it's big – standing at 6.5 inches. It has a conventional 3.5mm socket for connecting wired headphones and near-field communication (NFC) can be enabled for contactless payments.

Note that we do have concerns over the security of the face scanner and suggest you use the fingerprint scanner instead. This is because the face recognition was easily fooled with a printed photograph in our tests.

Compare the prices at different retailers below or read our expert Motorola Moto G13 review for more details.

Google Pixel 7

Google Pixel 7 smartphone
  • Google Tensor G2 chip with 8GB of Ram
  • 6.3-inch OLED display
  • Double rear cameras

We like: Takes impressive videos

We don’t like: Battery life could be better

Now the Google Pixel 8 has been released, the Pixel 7 is seeing promising discounts at Amazon. It has a high-resolution screen (2,400 x 1,080 pixels) with a quick refresh rate for smooth browsing. The cameras offer 8x super resolution zoom, which we put to the test in the lab. You can enjoy it until October 2027 as it gets five years of security updates from its launch.

Check prices below, compare contract deals and read our Google Pixel 7 review.

Motorola Edge 40

Motorola Edge 40
  • 6.55-inch screen
  • 4,400mAh battery
  • 5G capable

We like: Vibrant OLED screen

We don’t like: Poor waterproofing and durability

The Edge 40 is a well-equipped mid-range smartphone. Its OLED screen with a 144Hz refresh rate was smooth and vibrant. The cameras are good for a phone of this price, producing nicely detailed images in well-lit conditions, although we found they lacked sharpness.

The main concern with the Edge 40 comes from its IP68 rating, which should provide up to 30 minutes of submersion in water. However, the models we tested suffered damage when tested and would no longer charge, so don't get it wet.

Check prices below, compare contract deals and read our Motorola Edge 40 review.

How to spot a good deal on a mobile phone

Amy Axworthy, Which? mobile phones expert, says:

Amy Axworthy
  • Avoid buying a phone that will soon lose its security support. Sometimes phone deals can look great, but if it's a much older model, it might be at risk of losing important security updates fairly soon after you buy it. Security updates and patches are important to keep your data safe. We only recommend deals on phones (see above) that we estimate have at least two years of security patches remaining.
  • Decide what's most important to you in your new phone. Cameras are generally the biggest expense, but you might find the pricey camera features aren't important to you. Often, a long battery life and crystal-clear screen can be found on much cheaper phones. Check out our mobile phone reviews to explore all there is to offer.
  • In general, Android phones are cheaper than Apple iPhones and the deals are likely to be better, too. Find out the cheapest we recommend in our Great Value picks.

Best Apple iPhone deals

Discounts on iPhones are rare, but you can get a bargain on older models.

Apple iPhone 14

  • 6.1-inch (2,532 x 1,170 pixels) Super Retina XDR display
  • Dual-camera system with a larger sensor
  • Estimated minimum of six years of security updates from launch

We like: Camera upgrades

We don’t like: No Dynamic Island notch on the display

The Apple iPhone 14 from 2022 is being discounted now the Apple iPhone 15 has just been released. It's the standard model in the 14 range, and the cheapest, but it has a number of premium perks. The processor – called the A15 Bionic chip – is the same as in the iPhone 13, but it received an upgraded 5-core GPU and 6GB of memory. The front-facing camera has powerful autofocus, making it smarter at focusing in pictures.

It comes in five different colours and with 128GB, 256GB or 512GB of memory. Cinematic mode records in 4K, but the cameras aren't as advanced as on the iPhone 14 Pro.

To find out if it lives up to expectations, check out our iPhone 14 review.

Apple iPhone 14 Plus

Apple iPhone 14 Plus
  • 6.7-inch screen
  • 4,323mAh battery
  • 5G capable

We like: Large screen

We don’t like: Security features aren’t as easy to use as some

The iPhone 14 Plus is just the 14 with a bigger screen and battery, featuring the screen found on the iPhone 14 Pro Max but without the extra processing power.

It comes in three storage options – 128GB, 256GB or 512GB – and in five colours: blue, purple, black, white or red.

To find out if it lives up to expectations, check out our iPhone 14 Plus review.

Read our dedicated guide to the best Apple iPhone deals for more expert picks, and advice on how and when to buy. 

Best second-hand phone deals

You can get good savings on a smartphone by looking at the second-hand and refurbished market. Below, we've picked out some great deals that will save you some serious money.

Or check our mobile phone reviews for popular handsets now only available second-hand, and read our guide on how to buy a second-hand or refurbished phone.

Apple iPhone 13 (original price £799, now around £375 second-hand) 

iPhone 13

Since the release of the iPhone 15 in September 2023, the iPhone 13 series from 2021 is seeing some major discounts on the second-hand market. It doesn't have the advanced cameras of the iPhone 13 Pro, but it doesn't scrimp on specs: you'll get Apple's A15 Bionic Chip, a striking display and the sought-after cinematic camera mode. We expect Apple will support it with regular security updates until at least January 2027.

We've seen it on sale for around £375 in 'good' second-hand condition at Music Magpie. Find out the full story in our Apple iPhone 13 review.

Also consider these popular phones that can now be found cheaper at multiple second-hand retailers:

  • Apple iPhone 12 (original price £799, now £240 second-hand): More and more iPhone 12s are appearing on the second-hand market. You should find them for £200-£500, depending on the phone's condition. The cheapest one in 'good' or grade B condition we found was at iOutlet for around £240.
  • Apple iPhone 12 Pro (original price £1,149, now £300 second-hand): The iPhone 12 Pro is an upgrade from the 12, with better cameras. It currently goes for almost a quarter of its original price in 'good' second-hand condition. We've seen it on sale for around £300 at Music Magpie.
  • Samsung Galaxy S21 FE (original price £699, now £260 second-hand): This is Samsung's toned-down version of the Galaxy S21, with excellent specs. It was released in January 2022 but is already prominent on the second-hand market for around £230-£375. Samsung will support it with regular security updates until January 2027. The cheapest deal we found in stock for one in a grade B condition was from CEX in white for around £260, which comes with a two-year warranty. 

Find out more: how to make big savings on a second-hand phone

Mobile phone contract calculator

A key question will be whether you buy outright or on contract. How much each will cost overall can be difficult to work out, so use our calculator below to discover the best deal for you.

Best Sim-only deals

Getting a Sim-only deal for your handset can be a great way to get a real bargain on your monthly data and calls allowance. Here's our pick of some of the best low, medium and high-data deals in the sales. 

Best low-data Sim-only deals 

You shouldn't pay for data you don't need so if you're a light user, opt for a cheap monthly contract that gives you the ability to switch around as circumstances change. 

Our pick: Smarty (Three network) 6GB of data

Smarty includes 6GB of EU roaming with this great value low-data deal. Even better, Smarty's 30-day Sim-only contracts means customers are not hit by costly inflation-based mid-contract price increases, and it's easy to switch if you find a better deal elsewhere. Read our Smarty review to see how it fares in our survey.

Other low-data deals to consider

Alternatively, check the low-data deals below for more packages that we think also represent good value for money.

Best medium-data Sim-only deals

These deals could be suitable if you use mobile data fairly frequently but don't require large amounts for activities such as HD downloading or streaming.

Our pick: iD Mobile (Three network) 50GB of data

iD Mobile includes 30GB of EU roaming in this deal, plus its Sim-only contracts aren't hit by costly inflation-based mid-contract price increases. You can also easily check the renewal price before the end of each month and have the flexibility to switch easily if you find a better deal, with no penalty. Read our iD Mobile review to see how it fares in our survey. 

Other medium-data deals to consider

Alternatively, check the medium-data deals below for more packages that we think represent good value for money.

Best high-data Sim-only deals

A high-data deal is ideal if you're after continuous connectivity, downloading, streaming and hotspot use. These types of deals may require a 12-month contract, so consider how committed you are and how much data you're likely to use. 

Our pick: Talkmobile (Vodafone network) 120GB of data

5GB of EU roaming is included with this great value high-data deal. Talkmobile have announced that they will not be raising prices on monthly plans in 2024, for both new and existing customers. Out-of-plan charges, such as roaming and international rates, are excluded. Read our Talkmobile review to see how it fares in our survey.

Other high-data deals to consider

Alternatively, check the high-data deals below for more packages that we think represent good value for money.

Not found one that's quite right for you? Browse all the best Sim-only deals on Which? Mobile Switch.

Pros and cons of buying a mobile phone on a monthly contract

With a traditional monthly contract, you pay a fixed minimum fee by direct debit each month, made up of paying for the phone (usually through a credit agreement, meaning you get credit-checked) and the Sim itself, with an allowance of calls, texts and data. You'll have to commit to a period of time, typically two years. Depending on your plan, there may also be an upfront fee, which is worth considering if you're set on a contract. 

What are the advantages of monthly contracts? 

  • Free/cheap phones: With a monthly contract, you'll get a wide choice of free or subsidised handsets, which is ideal if you fancy an upgrade. 
  • Good value: Paying in advance for a fixed amount of minutes, texts and data can be much cheaper than topping up a PAYG phone. 
  • Hassle-free: You’ll never get cut off for forgetting to top up your credit. 
  • Can build your credit score: Paying off a mobile phone contract monthly can be a good way to build your credit score. Bear in mind that missed payments or defaulting can make your credit score drop, though. 

Are there any drawbacks with monthly contracts?

There are a few. As mentioned, you may end up paying more overall, so you'll need to weigh this up against the appeal of a lower upfront cost. 

Pay attention to the length of the contract – most last two years, but some can last three, in order to keep the monthly cost attractive. You should also make a note of when your contract ends because some providers continue to charge you the full monthly cost, even after your contract has been paid off. 

If you exceed the minutes, messages or data in your bundle, additional charges can be significant. It's especially important to be aware of this while roaming. Most providers now set a default cap to prevent this, but if you remove it in order to continue using your phone, costs can quickly spiral. For more information, read our guide on how to keep track of your minutes and data, and our guide on EU roaming and international calls. 

Consider network reception with a great mobile phone deal

Signal is another consideration – if you know a particular network is good in your area, you may want to stick with it but move to a different provider. If it isn't, it could be time to switch. 

Here are the core networks the virtual providers use:

  • EE  BT Mobile, Plusnet Mobile, Utility Warehouse
  • O2 – Giffgaff, Sky Mobile, Tesco Mobile, LycaMobile, Virgin Mobile
  • Three – ID Mobile, Smarty
  • Vodafone – Asda Mobile, Lebara, Talkmobile, Voxi

When it's time to switch mobile phone provider

If all else fails, it might be time to switch. Outside the big four – EE, O2, Three and Vodafone – a wide range of operators are now competing for your business and some offer great-value Sim-only deals. Switching is easy and you should be able to keep your old number.

Arming yourself with a price you could get elsewhere is an important haggling tactic. Compare mobile phone contracts and Sim-only deals to find out how much you could be paying.

Smaller mobile networks consistently do better than the big four in our mobile networks survey. Read our guide to the best and worst UK mobile networks to find out more.

Best mobiles

How to get the best mobile phone deal on popular brands

Generally, you'll find the best deals on mobile phones at retailers such as Amazon, Currys and John Lewis, rather than on the manufacturer's website. However, knowing when sales are on for specific brands can be useful if you're trying to find the best deal on a specific model you want. 

iPhone deals

It's notoriously tricky to bag an iPhone on a budget – and when discounts are available, they're usually smaller than on Android devices. However, iPhones hold their value better than older Androids, so you often see them on the second-hand market.

If you look in the right place at the right time, you can get some money off. Retailers such as Amazon and Argos occasionally bring their prices down, but make sure you're buying a new – rather than a refurbished – handset.

New iPhones usually launch in September, so the end of the year is a good time to look for previous models, particularly during Black Friday and Christmas sales.

Apple also offers a trade-in scheme, so you can knock the price of a new handset down slightly if you're upgrading from an older iPhone.

Browse all our iPhone reviews to see how all Apple handsets scored in our lab tests.

Google mobile phone deals

Google launches its flagship phones in October, so it's worth putting a Pixel on your shortlist late in the year.

You'll see the best bargains on older handsets, but more recent phones can sometimes get early discounts at major retailers such as Carphone Warehouse and Laptops Direct.

See if it's worth investing in a Pixel by reading our Google Pixel reviews

Samsung mobile phone deals

If you're after a discounted Samsung Galaxy, you may be tempted by some of the reasonably priced handsets in its A, J and M ranges. Mid-range models have come on in leaps and bounds over the past few years, and spending £300 to £400 can get you a slim, stylish and powerful model that may not look too different from a high-end version.

If you have your eyes on the premium prize, though, it could be worth holding out for a top-of-the-range Galaxy S or Note series. The Samsung S series usually launches in the first quarter of the year, with the first discounts on the latest handsets beginning in the summer. It's worth keeping an eye out on Amazon Prime Day in July.

Phones in the Note range tend to launch in August, so new models are ripe for a decent discount when Black Friday rolls around. If you miss out, the Boxing Day sales are a good time to buy, too.

We've reviewed more than 40 Galaxy phones. Pick your perfect model in all our Samsung phone reviews.

Mobile phones and security updates

Deals on phones are easier to find when they've been on the market for a while, but depending on the brand and handset, this could mean they won't be receiving security updates for much longer. Check our security update calculator for models you're interested in buying. See our guide to mobile phone security. 

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