Realme C21 vs Xiaomi Mi 11 Ultra
Shop Android Smartphones
Realme C21
Starting at
£198.00
Xiaomi Mi 11 Ultra
Starting at
£315.00What's the difference between the Realme C21 and Xiaomi Mi 11 Ultra?
Realme C21 vs Xiaomi Mi 11 Ultra comes down to the chipset, RAM and screen size. Refurbished, the Realme C21 starts at £198, £117 less than the Xiaomi Mi 11 Ultra.
Refurbished from
Chipset
RAM
Screen size
Screen type
Main camera
- Chipset: Mediatek MT6765G Helio G35 on the Realme C21, Qualcomm SM8350 Snapdragon 888 5G (5 nm) on the Xiaomi Mi 11 Ultra.
- The Xiaomi Mi 11 Ultra has more RAM: 12 GB vs 4 GB.
- Screen size: 6,5 inch on the Realme C21, 6.81 inch on the Xiaomi Mi 11 Ultra.
Realme C21 vs Xiaomi Mi 11 Ultra specs
The Realme C21 and Xiaomi Mi 11 Ultra both come from 2021 but serve different user needs. Realme C21 is suited for everyday use with a large 5000 mAh battery, 4 GB RAM, and a 6.5 inch IPS LCD screen at 720 x 1600 resolution. Xiaomi Mi 11 Ultra targets users who want top-tier performance, with a Snapdragon 888 chipset, 12 GB RAM, and an expansive 6.81 inch AMOLED screen at 1440 x 3200 resolution. Xiaomi also offers a 5G network and higher resolution cameras, while Realme includes a microSDXC slot for expandable storage. Both have similar battery capacity and dual SIM support. Choose Realme C21 for practical daily use with expandable storage, and Xiaomi Mi 11 Ultra for a premium multimedia and performance experience.
Realme C21 vs Xiaomi Mi 11 Ultra price
Colour
- BlackSold out
- WhiteSold out
Storage
- 64GBSold out
- 256GBSold out
Realme C21 vs Xiaomi Mi 11 Ultra battery life and software updates
Both phones share some features but differ in others that may affect long-term use.
Battery Capacity
Both the Realme C21 and Xiaomi Mi 11 Ultra have a 5000 mAh battery. This capacity supports extended usage throughout the day for most users, making either phone suitable if battery life is a priority.
Battery
Foldable
Year of release
Realme C21 vs Xiaomi Mi 11 Ultra performance
Performance differences are significant between these two phones. They vary in chipset, RAM, and storage, which affects multitasking, app speed, and data capacity.
Processor Power
Realme C21 uses a Mediatek MT6765G Helio G35, which is suited for everyday tasks and basic apps. Xiaomi Mi 11 Ultra features a Qualcomm SM8350 Snapdragon 888 5G chipset built on a 5 nm process, offering strong performance for demanding applications and gaming.
Memory Capacity
Realme C21 comes with 4 GB RAM, enough for smooth operation of common apps and light multitasking. Xiaomi Mi 11 Ultra includes 12 GB RAM, which supports more extensive multitasking and heavier app use without slowdown.
Storage Options
Realme C21 is stocked with 64 GB storage, a practical size for everyday needs and media storage. Xiaomi Mi 11 Ultra offers 256 GB of storage, suitable for users who require space for large files, apps, and media collections.
Chipset
RAM
Realme C21 vs Xiaomi Mi 11 Ultra screen
Screen quality affects how you view content and interact with your phone. These two devices differ in screen size, resolution, and type, influencing clarity and colour richness.
Screen Size and Resolution
Realme C21 has a 6.5 inch screen with a resolution of 720 x 1600 pixels, offering basic clarity for everyday viewing. Xiaomi Mi 11 Ultra features a larger 6.81 inch screen with a higher resolution of 1440 x 3200 pixels, delivering sharper images and more detail, which benefits users who watch videos or browse photos frequently.
Screen Technology
Realme C21 uses an IPS LCD screen, which typically provides good colour accuracy and wide viewing angles. Xiaomi Mi 11 Ultra uses an AMOLED screen, known for deeper blacks and more vibrant colours, enhancing visual experience for media and gaming.
Refresh rate
Resolution
Screen size
Screen type
Realme C21 vs Xiaomi Mi 11 Ultra camera
Audiovisual features focus on camera quality, which is important for photography and video calls. The two phones differ noticeably in camera resolution.
Front Camera
Realme C21 has a 5 megapixel front camera suitable for basic selfies and video calls. Xiaomi Mi 11 Ultra offers a 20 megapixel front camera, which captures more detail and clarity, ideal for users who value high-quality self-portraits or video calls.
Main Camera
Realme C21 includes a 13 megapixel main camera that works well for casual photography. Xiaomi Mi 11 Ultra features a 50 megapixel main camera, designed to capture images with greater detail and sharpness, suitable for photography enthusiasts or those who frequently take photos.
Front camera
Main camera
Realme C21 vs Xiaomi Mi 11 Ultra size and design
Other features such as network compatibility, size, weight, and storage expandability can affect daily convenience and usage comfort.
Network and SIM
Realme C21 supports 4G networks and has a dual physical SIM slot along with a microSDXC card slot for expandable storage. Xiaomi Mi 11 Ultra supports 5G and also includes dual physical SIM slots but does not have expandable storage. Users wanting faster mobile data may prefer Xiaomi, while those needing extra storage might choose Realme.
Dimensions and Weight
Realme C21 measures 165.2 mm in height, 76.4 mm in width, and is 8.9 mm deep, weighing 190 g. Xiaomi Mi 11 Ultra is slightly shorter at 164.3 mm height, narrower at 74.6 mm width, and thinner at 8.4 mm depth, but heavier at 234 g. Realme may feel lighter in hand, while Xiaomi's dimensions provide a slightly more compact footprint.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
Weight
Width
Realme C21 or Xiaomi Mi 11 Ultra: which should you buy?
Buy the Realme C21 if
- you want to spend less: it starts at £198, £117 less than the Xiaomi Mi 11 Ultra
- you want a lighter build (190 g vs 234 g)
- you want a memory card slot
Buy the Xiaomi Mi 11 Ultra if
- you want more RAM (12 GB vs 4 GB)
- you want an OLED screen
- you want a higher-resolution main camera (50 megapixels vs 13 megapixels)
Realme C21 vs Xiaomi Mi 11 Ultra FAQs
Realme C21 vs Xiaomi Mi 11 Ultra comes down to the chipset, RAM and screen size. Chipset: Mediatek MT6765G Helio G35 on the Realme C21, Qualcomm SM8350 Snapdragon 888 5G (5 nm) on the Xiaomi Mi 11 Ultra. The Xiaomi Mi 11 Ultra has more RAM: 12 GB vs 4 GB.
The Realme C21 is cheaper refurbished, from £198 compared with £315 for the Xiaomi Mi 11 Ultra.
Both have the same battery: 5000 mAh.
The Xiaomi Mi 11 Ultra has a higher-resolution main camera: 50 megapixels vs 13 megapixels.
Refurbished, the Realme C21 comes in 64GB, and the Xiaomi Mi 11 Ultra in 256GB.
