Galaxy M21 vs Oppo Reno4 Z 5G
Shop Samsung Galaxy
Galaxy M21
Starting at
£89.00
Oppo Reno4 Z 5G
Starting at
£105.00What's the difference between the Galaxy M21 and Oppo Reno4 Z 5G?
Galaxy M21 vs Oppo Reno4 Z 5G comes down to the chipset, RAM and battery. Refurbished, the Galaxy M21 starts at £89, £16 less than the Oppo Reno4 Z 5G.
Refurbished from
Chipset
RAM
Battery
Screen size
Screen type
- Chipset: Exynos 9611 on the Galaxy M21, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G.
- The Oppo Reno4 Z 5G has more RAM: 8 GB vs 4 GB.
- The Galaxy M21 has a bigger battery: 6000 mAh vs 4000 mAh.
Galaxy M21 vs Oppo Reno4 Z 5G specs
The Galaxy M21 and Oppo Reno4 Z 5G both launched in 2020 and offer distinct advantages depending on your priorities. The Galaxy M21 stands out with a larger battery and expandable storage, making it suitable for longer daily use and those who want flexibility with memory. The Oppo Reno4 Z 5G offers a bigger screen and more RAM, ideal if you prefer a roomier display and smoother multitasking. It also supports 5G, which may appeal if faster mobile networks matter to you. Both have Android and dual SIM support, but differences in screen type and camera details mean each fits different user needs.
Galaxy M21 vs Oppo Reno4 Z 5G price
Colour
- BlueSold out
- WhiteSold out
Storage
- 64GBSold out
- 128GBSold out
Galaxy M21 vs Oppo Reno4 Z 5G battery life and software updates
Durability covers battery size, software updates, and build features that affect daily reliability. Both phones run Android and are from 2020, but they differ in battery capacity and software update support.
Battery Capacity
The Galaxy M21 has a 6000 mAh battery, which suits users who want longer time between charges. The Oppo Reno4 Z 5G has a 4000 mAh battery, which supports typical daily use but may need more frequent charging for heavy users.
Software Updates
This means both devices will run the version of Android they shipped with or last supported, which works well for everyday tasks.
Battery
Foldable
Software updates
Year of release
Galaxy M21 vs Oppo Reno4 Z 5G performance
Performance depends on the chipset, RAM, and storage. These affect speed, app handling, and how much data you can keep on the device.
Memory Size
The Oppo Reno4 Z 5G comes with 8 GB of RAM, which is good for keeping many apps open and smooth multitasking. The Galaxy M21 has 4 GB of RAM, which suits everyday use and basic multitasking.
Chipset
The Galaxy M21 uses an Exynos 9611 chipset, while the Oppo Reno4 Z 5G uses a Mediatek Dimensity 800. Both chipsets support typical smartphone tasks, but the Oppo's chipset supports 5G connectivity.
Storage Capacity
The Oppo Reno4 Z 5G is stocked with 128GB of internal storage, offering more space for apps, photos, and media. The Galaxy M21 is stocked with 64GB, which suits lighter storage needs but can be expanded with a microSDXC card.
Chipset
RAM
Galaxy M21 vs Oppo Reno4 Z 5G screen
Screen quality affects how you view videos, browse, and interact with your phone. The two devices differ in screen size, type, and resolution details.
Screen Size and Resolution
The Oppo Reno4 Z 5G has a larger 6.57 inch screen with a 1080 x 2400 resolution, making it better for watching videos and gaming. The Galaxy M21 has a 6.4 inch screen with a 1080 x 2340 resolution, which is slightly smaller but still sharp.
Screen Technology
The Galaxy M21 uses a Super AMOLED screen, known for vivid colours and deep blacks. The Oppo Reno4 Z 5G uses an IPS LCD screen, which provides accurate colour and good brightness, suited to those who prefer natural tones.
Refresh rate
Resolution
Screen size
Screen type
Galaxy M21 vs Oppo Reno4 Z 5G camera
Audiovisual features focus on camera quality, an important factor if you take many photos or video calls.
Front Camera
The Galaxy M21 has a 20 megapixel front camera, which suits users who want detailed selfies and sharp video calls. The Oppo Reno4 Z 5G has a 16 megapixel front camera, which captures good quality images and video.
Main Camera
Both phones feature a 48 megapixel main camera, which is capable of capturing detailed photos in a variety of lighting conditions.
Camera type
Front camera
Main camera
Galaxy M21 vs Oppo Reno4 Z 5G size and design
Other features include network compatibility, physical dimensions, and storage options that affect daily convenience and use.
Network and SIM
The Oppo Reno4 Z 5G supports 5G networks, suitable for those wanting faster mobile data where available. The Galaxy M21 supports 4G. Both phones have dual physical SIM slots and are unlocked for use with any carrier.
Storage Expansion
The Galaxy M21 offers a microSDXC card slot, letting you add extra storage if needed. The Oppo Reno4 Z 5G does not have expandable storage, so you rely on its built-in 128GB.
Size and Weight
The Oppo Reno4 Z 5G is slightly larger at 163.8 mm height and 8.1 mm depth, with a width of 75.5 mm and weight of 184 g. The Galaxy M21 measures 159 mm in height, 8.9 mm in depth, 75.1 mm in width, and weighs 188 g. These differences may affect how each phone feels in your hand or pocket.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
Weight
Width
Galaxy M21 or Oppo Reno4 Z 5G: which should you buy?
Buy the Galaxy M21 if
- you want to spend less: it starts at £89, £16 less than the Oppo Reno4 Z 5G
- you want a bigger battery (6000 mAh vs 4000 mAh)
- you want an OLED screen
Buy the Oppo Reno4 Z 5G if
- you want more RAM (8 GB vs 4 GB)
- you want a bigger screen (6.57 inch vs 6.4 inch)
- you want 5G
Galaxy M21 vs Oppo Reno4 Z 5G FAQs
Galaxy M21 vs Oppo Reno4 Z 5G comes down to the chipset, RAM and battery. Chipset: Exynos 9611 on the Galaxy M21, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G. The Oppo Reno4 Z 5G has more RAM: 8 GB vs 4 GB.
The Galaxy M21 is cheaper refurbished, from £89 compared with £105 for the Oppo Reno4 Z 5G.
The Galaxy M21 has a bigger battery: 6000 mAh vs 4000 mAh.
Both have the same main camera: 48 megapixels.
Updates for the Galaxy M21 ended in Mar 2024. We don't have published update dates for the Oppo Reno4 Z 5G.
Refurbished, the Galaxy M21 comes in 64GB, and the Oppo Reno4 Z 5G in 128GB.
