Galaxy S20 Ultra 5G vs OnePlus 8 Pro
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Galaxy S20 Ultra 5G
Starting at
£233.80£1,220.00 new
OnePlus 8 Pro
Starting at
£177.00What's the difference between the Galaxy S20 Ultra 5G and OnePlus 8 Pro?
Galaxy S20 Ultra 5G vs OnePlus 8 Pro comes down to the battery, screen size and screen type. Refurbished, the OnePlus 8 Pro starts at £177, £56.80 less than the Galaxy S20 Ultra 5G.
Refurbished from
Battery
Screen size
Screen type
Main camera
Front camera
- The Galaxy S20 Ultra 5G has a bigger battery: 5000 mAh vs 4510 mAh.
- Screen size: 6.9 inch on the Galaxy S20 Ultra 5G, 6.78 inch on the OnePlus 8 Pro.
- Screen type: Dynamic AMOLED 2X on the Galaxy S20 Ultra 5G, Fluid AMOLED on the OnePlus 8 Pro.
Galaxy S20 Ultra 5G vs OnePlus 8 Pro specs
The Galaxy S20 Ultra 5G and the OnePlus 8 Pro, both released in 2020, share many features such as 12GB RAM and 5G connectivity. The Galaxy S20 Ultra 5G suits you if you want a larger screen of 6.9 inches, a higher resolution, and a bigger battery capacity of 5000 mAh. It also offers a microSDXC slot for extra storage and a combination of physical SIM and eSIM. The OnePlus 8 Pro has a slightly smaller 6.78 inch screen with a resolution close to the Galaxy's, comes in higher storage options of up to 256GB, and uses dual physical SIMs. It is lighter and a little slimmer. The choice depends on whether you prioritise screen size, storage expandability, or device weight and dimensions.
Galaxy S20 Ultra 5G vs OnePlus 8 Pro price
Colour
- GreenSold out
- BlackSold out
Storage
- 128GBSold out
- 256GBSold out
Galaxy S20 Ultra 5G vs OnePlus 8 Pro battery life and software updates
Battery life and SIM options influence everyday use and convenience. Your choice here depends on battery needs and how you use SIM cards.
Battery Capacity
The Galaxy S20 Ultra 5G has a larger 5000 mAh battery, which suits you if you want longer use between charges, especially for heavy use or long days. The OnePlus 8 Pro has a 4510 mAh battery, which still supports regular daily use but may require more frequent charging if you use your phone intensively.
SIM Card Setup
The Galaxy S20 Ultra 5G supports one physical SIM plus an eSIM, which is useful if you want to keep a physical SIM and add a second number digitally. The OnePlus 8 Pro provides dual physical SIM slots, which is ideal if you prefer managing two physical SIM cards without using an eSIM.
Battery
Fast charging
Foldable
Software updates
Year of release
Galaxy S20 Ultra 5G vs OnePlus 8 Pro performance
Chipset
RAM
Galaxy S20 Ultra 5G vs OnePlus 8 Pro screen
Screen size and resolution affect how much you see and how sharp images appear. Both have high-resolution AMOLED displays but differ in size and screen technology.
Screen Size
The Galaxy S20 Ultra 5G features a larger 6.9 inch screen, offering more room for watching videos, browsing, and multitasking. The OnePlus 8 Pro has a slightly smaller 6.78 inch screen, which makes it easier to handle with one hand while still providing a spacious display.
Screen Resolution
The Galaxy S20 Ultra 5G has a resolution of 1440 x 3200, which delivers very sharp and detailed images. The OnePlus 8 Pro's resolution is close at 1440 x 3168, still offering excellent clarity. Both screens are well suited for high-quality media viewing.
Screen Type
The Galaxy S20 Ultra 5G uses a Dynamic AMOLED 2X screen, which is designed to offer vibrant colours and deep contrast. The OnePlus 8 Pro uses a Fluid AMOLED display, which also delivers smooth visuals and bright colours, making either phone ideal for immersive viewing.
Refresh rate
Resolution
Screen size
Screen type
Galaxy S20 Ultra 5G vs OnePlus 8 Pro camera
Camera quality is a major factor if you take many photos or selfies. Both phones feature four cameras on the back but differ in megapixel counts for main and front cameras.
Main Camera Resolution
The Galaxy S20 Ultra 5G has a main camera of 108 megapixels, capturing more detail in photos which suits you if you want high-resolution images for cropping or large prints. The OnePlus 8 Pro's main camera is 48 megapixels, which still takes sharp and clear photos suitable for everyday use.
Front Camera Resolution
The Galaxy S20 Ultra 5G offers a 40 megapixel front camera, ideal for highly detailed selfies or video calls. The OnePlus 8 Pro has a 16 megapixel front camera, which works well for regular selfie and video chat needs.
Camera type
Front camera
Main camera
Galaxy S20 Ultra 5G vs OnePlus 8 Pro size and design
Other features such as weight, size, and storage options affect comfort and flexibility. These details help decide which phone fits your daily habits and preferences.
Storage Options
The Galaxy S20 Ultra 5G is stocked with 128GB storage, while the OnePlus 8 Pro offers 128GB and 256GB variants. Choose the OnePlus 8 Pro if you want more built-in storage space without relying on external cards.
Expandable Storage
The Galaxy S20 Ultra 5G supports microSDXC cards, so you can expand storage easily if 128GB is not enough. The OnePlus 8 Pro does not have a microSD slot, so you rely on internal storage only.
Physical Dimensions and Weight
The Galaxy S20 Ultra 5G is larger and heavier, measuring 166.9 mm tall, 76 mm wide, 8.8 mm deep, and weighing 222 g. The OnePlus 8 Pro is smaller and lighter at 165.3 mm tall, 74.4 mm wide, 8.5 mm deep, and 199 g. The OnePlus is easier to hold and pocket, while the Galaxy offers a larger presence.
Network and Connectivity
Both phones support 5G and come unlocked with USB-C connectors, making them compatible with modern networks and accessories.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
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Width
Galaxy S20 Ultra 5G or OnePlus 8 Pro: which should you buy?
Buy the Galaxy S20 Ultra 5G if
- you want a bigger battery (5000 mAh vs 4510 mAh)
- you want a higher-resolution main camera (108 megapixels vs 48 megapixels)
- you want a higher-resolution front camera (40 megapixels vs 16 megapixels)
Buy the OnePlus 8 Pro if
- you want to spend less: it starts at £177, £56.80 less than the Galaxy S20 Ultra 5G
- you want a lighter build (199 g vs 222 g)
What our customers say
Customers who chose the Galaxy S20 Ultra 5G often highlight how the phone looks like new and appreciate its clear screen resolution and 12GB RAM for smooth performance. Several mention the phone fits their needs perfectly, especially valuing the large screen and camera quality. Battery life receives mixed comments, with some finding it lasting well and others wishing it lasted longer. The device's size and weight are not frequently mentioned, but the consistent theme is satisfaction with the phone's condition and capabilities.
Users of the OnePlus 8 Pro praise its condition, often noting it looks almost mint or like brand new. The phone's performance and ease of use are appreciated, including simple SIM card setup and smooth operation. Battery life is mentioned as draining quickly or getting hot in some cases, which might be noticeable with heavy use. Customers like the phone's high spec and storage options, and find it a good value for its price. The size and weight make it comfortable for everyday handling.
Overall, the Galaxy S20 Ultra 5G suits you if you want a larger screen and higher camera megapixels with expandable storage, while the OnePlus 8 Pro fits you if you prefer a lighter phone with options for more built-in storage and dual physical SIMs.
Galaxy S20 Ultra 5G vs OnePlus 8 Pro FAQs
Galaxy S20 Ultra 5G vs OnePlus 8 Pro comes down to the battery, screen size and screen type. The Galaxy S20 Ultra 5G has a bigger battery: 5000 mAh vs 4510 mAh. Screen size: 6.9 inch on the Galaxy S20 Ultra 5G, 6.78 inch on the OnePlus 8 Pro.
The OnePlus 8 Pro is cheaper refurbished, from £177 compared with £233.80 for the Galaxy S20 Ultra 5G.
The Galaxy S20 Ultra 5G has a bigger battery: 5000 mAh vs 4510 mAh.
The Galaxy S20 Ultra 5G has a higher-resolution main camera: 108 megapixels vs 48 megapixels.
Updates for the Galaxy S20 Ultra 5G ended in Mar 2025. We don't have published update dates for the OnePlus 8 Pro.
Refurbished, the Galaxy S20 Ultra 5G comes in 128GB, and the OnePlus 8 Pro in 128GB and 256GB.
