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 Alcatel 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 (April 2021)

The bestseller list compares brands and their smartphones. Which smartphone is the best?
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Best choice* TOP 1
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 2
Image of OnePlus  smartphone
OnePlus 9 Pro 5G (UK) SIM-Free Smartphone with Hasselblad Camera for Mobile - Pine Green 12GB RAM 256GB - 2 Year Warranty*
  • Alexa Built-in phones let you make phone calls, open apps, control smart home devices,…
  • Qualcomm Snapdragon 888 5G Mobile Platform - Overall 25% performance uplift over…
  • A day's power in 15 minutes - 4500 mAh Battery, Warp Charge 65T and Warp Charge Wireless…
BUY NOW*
TOP 3
Image of Samsung SM-A217FZKNEUA smartphone
Samsung Galaxy A21s Android Smartphone, SIM Free Mobile Phone, Black*
  • Weight (g) : 192
  • Smartphone with Android V10.0 Operating System
  • Mobile battery - High performance 5000 mAh Lithium-ion battery with 15 W quick mobile…
BUY NOW*
Offer* TOP 4
Image of Samsung SM-A125FZBVEUA smartphone
Samsung Galaxy A12 SIM Free Android Smartphone 64 GB, 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*
TOP 6
Image of OnePlus LDKSX000513 smartphone
OnePlus N100 4G 4GB RAM and 64GB Storage SIM-Free Smartphone with Triple Camera, Dual SIM and 5000 mAh Battery - Midnight Frost - 2 Year Warranty*
  • 4GB RAM + 64GB internal storage powered by the Qualcomm Snapdragon 460 Mobile Pl…
  • Superior Performance that takes you further5000 mAh Battery and OxygenOS enabling…
  • Built to Capture with a Triple Camera system and 8MP Front Camera13MP Primary rear…
BUY NOW*
TOP 7
Image of Samsung SM-G996BZSDEUA smartphone
Samsung Galaxy S21+ 5G Smartphone SIM Free Android Mobile Phone Phantom Silver 128GB*
  • Smartphone preloaded with the Android mobile phone V10 operating system
  • Featuring the toughest Gorilla Glass Victus, Glastic Rear & an AL7s10 Metal Frame…
  • Exynos 2100 5nm smartphone processor brings all the performance you need. Packed…
BUY NOW*
TOP 8
Image of DOOGEE DOOGEE X95 Green smartphone
Mobile Phone, DOOGEE X95 Smartphone SIM Free Phones Unlocked, 6.52 inches Waterdrop Full-Screen, 4350mAh Big Battery, Android 10.0, 13MP / 5MP Triple Cameras, 4G Dual SIM, Face ID, UK Version - Green*
  • SIM Unlocked Smartphone Nano + SD Doogee X95 SIM Free Mobile Phone has 2 independent…
  • Newest Android GO System & 4G Dual SIM Smartphone Doogee X95 Unlocked Mobile…
  • 13MP+2MP+2MP Triple Rear Cameras Doogee X95 SIM Free Unlocked Mobile Phone uses a…
BUY NOW*
TOP 9
Image of Nokia HQ5020KD22000 smartphone
Nokia 3.4 6.39 Inch Android UK SIM-Free Smartphone with 3GB RAM and 32GB Storage (Dual SIM) - Charcoal*
  • Get up to 70% better performance compared to previous generations, thanks to the…
  • Take in a truly timeless design that’s built to last, with a durable 3D Nano-textured…
  • Google Assistant Button: Ask questions, see your schedule or even dim the lights…
BUY NOW*
TOP 10
Image of Samsung SM-A715FZKUBTU smartphone
Samsung Galaxy A71 Mobile Phone; Sim Free Smartphone - Prism Crush Black*
  • What's in the box: Samsung Galaxy A71 Prism Crush Black smartphone, UK charger, user…
  • Video: you can film super-smooth action, putting professional mobile video at your…
  • Battery: giving you the freedom to go even further
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: 2021/04/22.