Realme 6 Pro vs Realme C21
Shop Android Smartphones
Realme 6 Pro
Starting at
£262.00
Realme C21
Starting at
£198.00What's the difference between the Realme 6 Pro and Realme C21?
Realme 6 Pro vs C21 comes down to the chipset, RAM and battery. Refurbished, the Realme C21 starts at £198, £64 less than the Realme 6 Pro. The Realme C21 is the newer model, released in 2021.
Refurbished from
Chipset
RAM
Battery
Screen size
Main camera
- Chipset: Qualcomm SM7125 Snapdragon 720G (8 nm) on the Realme 6 Pro, Mediatek MT6765G Helio G35 on the Realme C21.
- The Realme 6 Pro has more RAM: 6 GB vs 4 GB.
- The Realme C21 has a bigger battery: 5000 mAh vs 4300 mAh.
Realme 6 Pro vs Realme C21 specs
The Realme 6 Pro and Realme C21 both run Android and are unlocked 4G smartphones, but they suit different needs. Realme 6 Pro offers a higher resolution screen, more RAM, and stronger cameras, making it a good choice for users who value sharper displays and detailed photos. The Realme C21 has a larger battery and dual SIM slots, which benefits those who want longer usage between charges and the flexibility of two physical SIM cards. Storage options vary too, with the 6 Pro providing 128GB and the C21 64GB, supporting different amounts of apps and media. Each device fits well for either more multimedia focus or everyday use with longer battery life.
Realme 6 Pro vs Realme C21 price
Colour
- BlueSold out
- BlackSold out
Storage
- 128GBSold out
- 64GBSold out
Realme 6 Pro vs Realme C21 battery life and software updates
Battery capacity and software support are key durability considerations. Each device offers different battery sizes that affect how long they can go between charges.
Battery Capacity
The Realme 6 Pro has a 4300 mAh battery, which suits users who need solid daily use. The Realme C21 has a larger 5000 mAh battery, ideal for those who prefer longer intervals between charges or more use on the go without recharging.
Operating System
Both phones run Android, providing a familiar and flexible software environment.
Battery
Fast charging
Foldable
Year of release
Realme 6 Pro vs Realme C21 performance
Performance depends on the chipset, RAM, and storage, which affect speed, multitasking, and how much data you can keep on your device.
Processor and RAM
The Realme 6 Pro uses a Qualcomm Snapdragon 720G chipset with 6 GB of RAM, which suits users who want smoother multitasking and better handling of demanding apps. The Realme C21 has a Mediatek Helio G35 chipset with 4 GB of RAM, fitting everyday use with simpler apps and less multitasking.
Storage Capacity
Realme 6 Pro offers 128GB of storage, allowing more space for apps, photos, and media. Realme C21 comes with 64GB, which is suitable for users with moderate storage needs or those who prefer to expand storage using a microSD card.
Chipset
RAM
Realme 6 Pro vs Realme C21 screen
Screen size and resolution affect how much you can see and how sharp images and text appear, important for media and general use.
Screen Size
The Realme 6 Pro has a slightly larger 6.6 inch screen, providing a bit more space for watching videos or browsing. The Realme C21 has a 6.5 inch screen, still roomy enough for most everyday tasks.
Screen Resolution
Realme 6 Pro features a full HD resolution of 1080 by 2400 pixels, which suits users who want clearer, more detailed visuals. Realme C21 has a 720 by 1600 pixel resolution, good for those focused on practical use without needing the highest pixel density.
Screen Technology
Both devices use IPS LCD screens, which offer consistent colours and good viewing angles, making them effective for daily viewing.
Refresh rate
Resolution
Screen size
Screen type
Realme 6 Pro vs Realme C21 camera
Camera quality is important for capturing photos and selfies, and the devices differ notably in their megapixel counts.
Main Camera
The Realme 6 Pro has a 64 megapixel main camera, which is well suited for users wanting detailed photos and more creative control. Realme C21 features a 13 megapixel main camera, suitable for straightforward photography and everyday snapshots.
Front Camera
Realme 6 Pro offers a 16 megapixel front camera, supporting higher detail for selfies and video calls. Realme C21 provides a 5 megapixel front camera, fitting basic selfie needs and video chats.
Front camera
Main camera
Realme 6 Pro vs Realme C21 size and design
Other practical differences include SIM options, size, weight, and memory card support that affect daily convenience and handling.
SIM Card Options
Realme 6 Pro comes with a single physical SIM slot, suitable for users with one phone number. Realme C21 supports dual physical SIM cards, ideal if you want to manage two numbers or separate work and personal use.
Dimensions and Weight
The Realme 6 Pro measures 163.8 mm tall, 75.8 mm wide, and weighs 202 g. Realme C21 is slightly taller at 165.2 mm, a bit wider at 76.4 mm, and lighter at 190 g. These size and weight differences may affect how each feels in your hand or pocket.
Expandable Storage
Both phones support microSDXC cards for additional storage, which is useful if you want to store more photos, videos, or apps beyond the built-in memory.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
Weight
Width
Realme 6 Pro or Realme C21: which should you buy?
Buy the Realme 6 Pro if
- you want more RAM (6 GB vs 4 GB)
- you want a higher-resolution main camera (64 megapixels vs 13 megapixels)
- you want a higher-resolution front camera (16 megapixels vs 5 megapixels)
Buy the Realme C21 if
- you want to spend less: it starts at £198, £64 less than the Realme 6 Pro
- you want a bigger battery (5000 mAh vs 4300 mAh)
- you want a lighter build (190 g vs 202 g)
Realme 6 Pro vs Realme C21 FAQs
Realme 6 Pro vs C21 comes down to the chipset, RAM and battery. Chipset: Qualcomm SM7125 Snapdragon 720G (8 nm) on the Realme 6 Pro, Mediatek MT6765G Helio G35 on the Realme C21. The Realme 6 Pro has more RAM: 6 GB vs 4 GB.
The Realme C21 is cheaper refurbished, from £198 compared with £262 for the Realme 6 Pro.
The Realme C21 has a bigger battery: 5000 mAh vs 4300 mAh.
The Realme 6 Pro has a higher-resolution main camera: 64 megapixels vs 13 megapixels.
The Realme C21 adds a bigger battery (5000 mAh vs 4300 mAh) and a lighter build (190 g vs 202 g). Refurbished, it costs £64 less (from £198 vs £262).
Refurbished, the Realme 6 Pro comes in 128GB, and the Realme C21 in 64GB.









