Best smartphone 2021

Which is the best smartphone in the UK?

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The 10 best smartphones to buy in the UK

The top 10 list of the best smartphones lists various brands and prices

Review10Best compares the best smartphones in the UK and selects the one by Xiaomi as the best smartphone. In a smartphone buying guide, you can read more about the features of the different smartphones and see a recommendation on which smartphone to buy in the UK in 2021. By considering the top list of smartphones, you can find the best smartphones and save time shopping online.


Table of contents

  1. Read the ultimate smartphone buying guide
  2. View the smartphone picks and see how they rank in the top list

SEE THE TOP 10 LIST →
(skip buying guide)


Best smartphones: A complete buying guide

All you need to know before buying a great smartphone

Picture of a smartphone

Choosing the best smartphone for your needs can be difficult. With a near-endless selection of devices, knowing which one works for you can take a lot of time and effort! To make the process of choosing a great smartphone easier, check out the handy buying guide below for all the info you need!

What are smartphones?

A smartphone is a type of mobile phone that uses advanced hardware and consists of a powerful operating system. This allows the device to perform many functions, including phone calls, text messaging, internet browsing, taking videos and photos, and using various smartphone applications.

Why should you buy a good smartphone?

The best smartphone makes life more convenient. Essentially a small handheld computer, these devices are deceptively powerful, being cabling of various computing functions ranging from browsing the web to digital planners to instant messaging to playing video games.

If you want to keep in touch with friends and family, take all kinds of videos and photos, watch videos online, browse social media, manage email, and do countless other functions from the palm of your hand, then look no further than a smartphone.

Another picture of a smartphone
How to choose the right smartphone?

With so many things to consider, buying the best smartphone can be a daunting prospect. Here are some things to think about to make the process easier:

  • Operating System: Android and iOS are the main two operating systems on smartphones. Each one has its advantages, so think about what appeals to your preferences and requirements. For example, Android is known to be much more customizable and have access to more hardware and software option, while iOS has better security, receives more frequent updates, and can be easily integrated with other iOS devices such as an iPad, Mac or MacBook.
  • Screen Size: Given all the stuff you’re using it for, you should think about how large a screen you want. Devices with bigger screens are more expensive but are better for watching videos and generally improve the user experience. Conversely, smaller screens mean a more compact and lightweight device.
  • Storage Capacity: Smartphones have limited storage so always think about how much space you need for all your data. Measured in gigabytes (GB), the higher the number the more SSD storage space there is for photos, videos, apps, and other files. 32GB is a good starting point and can be more than enough for some, although there are much higher capacities including 64GB, 128GB, and even 256GB. Remember, that an external SD card might be a cheap alterantive for extra storage.
  • Camera: The camera function is very important for many consumers, so think about how good of a camera you want. If you take photos and videos then a camera with good focus, low-light performance, noise reduction, and a high megapixel count is recommended. Also, if you like taking selfies make sure there is a front-facing camera! Combine it with a good selfie stick and you are ready to go for great selfies.
  • Battery: The best smartphones typically have a battery life of around 8-16 hours, although these will degrade over time, so a phone with replaceable batteries may be worth consideration. iPhones don’t have this function however, so bear this in mind!
What is the best kind of smartphone in the UK?

Here are the best-selling smartphone currently available:

  • Android: Android smartphones are more varied, with various brands and manufacturers using this operating system. As a result, it is easy to find an Android smartphone for every budget, with an abundance of high quality and budget-friendly options alike.
  • iOS Smartphones: All iPhones use the iOS operating system, with ten generations of iPhone models available, meaning a good selection of price ranges. Newer models are typically the most expensive smartphones, although they come with some of the best features and security.
  • Windows Smartphones: Their popularity has waned in recent years but Windows Smartphones used to have good security, a user-friendly interface, and are generally very affordable. Unfortunately, development of this OS was discontinued. So, there are not many Windows smartphones available anymore.
…are you ready for the best picks of 2021?

Top 10 list of smartphones in the UK (December 2021)

The bestseller list compares brands and their smartphones. Which smartphone is the best?
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Best choice* TOP 1
Image of Xiaomi M2102J20SG smartphone
POCO X3 Pro - Smartphone 8+256GB, 6,67” 120Hz FHD+ DotDisplay, Snapdragon 860, 48MP Quad Camera, 5160mAh, Frost Blue (UK Version + 2 Years Warranty)*
  • Camera description: rear
  • Connector type: usb type c
  • Alexa Hands-free capable: Download the Alexa app on to use Alexa hands-free. Play…
BUY NOW*
TOP 2
Image of Samsung SM-A125FZBVEUA smartphone
Samsung Galaxy A12 SIM Free Android Smartphone Blue (UK Version)*
  • Defence-grade security: protects your mobile phone from the minute it’s turned…
  • Front Camera: With the Galaxy A12 8MP Front Camera and Live Focus, it's easy to snap…
  • Multi-Camera System: Upgrade your mobile photography with the Quad Camera and snap…
BUY NOW*
Offer* TOP 3
Image of Alcatel 5033X-2AALGB1 smartphone
Alcatel 1 (2019) Sim Free Unlocked UK 4G Smartphone, FullView 18:9 Display with 8MP Camera, 1GB RAM / 8GB Storage and Android Oreo (Go edition) - Metallic Black*
  • Grab your friends and get close for photo booth-style shots. Strike your best poses…
  • Capture the moment quickly and perfectly with One-Handed mode. It keeps all camera…
  • Put your best snapshots forward with Alcatel 1's social-ready camera. Photograph…
BUY NOW*
TOP 4
Image of Samsung SM-A125FZWVEUA smartphone
Samsung Galaxy A12 SIM Free Android Smartphone 64 GB, White (UK Version)*
  • Defence-grade security: protects your mobile phone from the minute it’s turned…
  • Front Camera: With the Galaxy A12 8MP Front Camera and Live Focus, it's easy to snap…
  • Multi-Camera System: Upgrade your mobile photography with the Quad Camera and snap…
BUY NOW*
TOP 5
Image of Alcatel . smartphone
Alcatel 1C 2019 Sim Free Unlocked UK Smartphone 18:9 Display 8GB Dual Sim- Black*
  • No matter if you're a righty or lefty, one-handed mode's display ensures all camera…
  • Social Square lets you review and share your picture as soon as its taken all while…
  • A 5 MP (interpolated to 8 MP) rear camera and 2 MP (interpolated to 5 MP) front camera…
BUY NOW*
TOP 7
Image of Ulefone Note 10 smartphone
Mobile Phone, Ulefone Note 10 Smartphone Android 11 Unlocked, 5500mAh Large Battery, 32GB 2GB, 4G Dual SIM Network, 3 Card Slots, 6.52 inch IPS Dewdrop Screen, Octa-core, GPS, WiFi, UK Version, Green*
  • Your purchase at our UF Mobile Store will enjoy two years warranty. We guarantee…
  • Support OTG, WiFi, Bluetooth, 3.5mm Audio Jack, GPS and so on.
  • Fingerprint Reader + Face Recognition: Note 10's advanced facial recognition intelligently…
BUY NOW*
TOP 8
Image of Samsung SM-A125FZKVEUA smartphone
Samsung Galaxy A12 SIM Free Android Smartphone Black (UK Version)*
  • Defence-grade security: protects your mobile phone from the minute it’s turned…
  • Front Camera: With the Galaxy A12 8MP Front Camera and Live Focus, it's easy to snap…
  • Multi-Camera System: Upgrade your mobile photography with the Quad Camera and snap…
BUY NOW*
TOP 9
Image of realme 6941399047365 smartphone
realme 8 5G Mobile Phone, Sim Free Unlocked Smartphone with Dimensity 700 5G Processor, 90Hz Ultra Smooth Display, 5000mAh Massive Battery, 48MP Nightscape Camera, Dual Sim, NFC, 6+128GB*
  • The realme 8 5G supports 2 Nano SIM cards and 1 MicroSD card simultaneously and supports…
  • Instant Side Fingerprint: With advanced biocapacitive side fingerprint unlocking,…
  • 8.5mm Super Slim: 5G smartphones have 200% more antennas than 4G phones. We still…
BUY NOW*
TOP 10
Image of Blackview A80 smartphone
Mobile Phone,Blackview A80 4G Smartphone SIM Free Phones Unlocked,Android 10 Phone with 6.217 inches Waterdrop Screen,13MP Quad Camera,4200mAh,2GB+16GB/128GB Extension,Face/Fingerprint Unlock-Black*
  • 4200mAh Long-lasting Battery & 2 Years WarrantyA80 SIM Free Phones has a large…
  • More BenefitFace ID & Fingerprint Unlock. Let your unique face become your key…
  • New Features of the Latest Android 10 PhonesDifferent from the previous Blackview…
BUY NOW*
Affiliate Disclosure

* We participate in the Amazon Associates Program. As an Amazon Associate we earn from qualifying purchases. For the list of the best smartphones, we consider only products that are available on Amazon while the ranking is based on factors such as customer reviews, number of sales and keyword. It is not a smartphone test. Last Update: 2021/12/08.