Galaxy A21s vs Oppo Reno4 Z 5G
Shop Samsung Galaxy
Galaxy A21s
Starting at
£60.24£219.00 new
Oppo Reno4 Z 5G
Starting at
£105.00What's the difference between the Galaxy A21s and Oppo Reno4 Z 5G?
Galaxy A21s vs Oppo Reno4 Z 5G comes down to the chipset, RAM and battery. Refurbished, the Galaxy A21s starts at £60.24, £44.76 less than the Oppo Reno4 Z 5G.
Refurbished from
Chipset
RAM
Battery
Screen size
Screen type
- Chipset: Exynos 850 on the Galaxy A21s, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G.
- The Oppo Reno4 Z 5G has more RAM: 8 GB vs 3 GB.
- The Galaxy A21s has a bigger battery: 5000 mAh vs 4000 mAh.
Galaxy A21s vs Oppo Reno4 Z 5G specs
The Galaxy A21s and Oppo Reno4 Z 5G both come from 2020 but offer distinct features for different needs. Galaxy A21s focuses on long battery life with a 5000 mAh capacity and expandable storage via microSDXC. Oppo Reno4 Z 5G offers more memory and storage with 8 GB RAM and 128 GB internal storage, plus 5G connectivity. The Reno4 Z 5G also has a higher resolution screen with a sharper display and a slightly better front camera. Galaxy A21s suits users who want longer battery life and flexibility with storage. Oppo Reno4 Z 5G fits those who want faster network access, more multitasking ability, and a crisper screen.
Galaxy A21s vs Oppo Reno4 Z 5G price
Colour
Storage
- 128GBSold out
Galaxy A21s vs Oppo Reno4 Z 5G battery life and software updates
Battery life and software updates matter for daily use and longevity.
Battery Capacity
Galaxy A21s has a 5000 mAh battery which offers longer usage between charges, ideal if you need your phone to last through long days. Oppo Reno4 Z 5G comes with a 4000 mAh battery, which still supports a full day of use but with less overall capacity.
Software Updates
Both run Android versions from their release year, which means software features remain consistent with their initial setup.
Battery
Fast charging
Foldable
Software updates
Year of release
Galaxy A21s vs Oppo Reno4 Z 5G performance
Performance depends on memory, storage, and chipset. These affect multitasking, app speed and storage space for files and apps.
Memory and Storage
Oppo Reno4 Z 5G comes with 8 GB RAM and 128 GB storage, which keeps everyday apps running smoothly and provides ample space for media and apps. Galaxy A21s offers 3 GB RAM and comes in 32GB or 64GB storage options, which suits simpler day-to-day use and lighter app demands.
Chipset
Galaxy A21s uses the Exynos 850 chipset, while Oppo Reno4 Z 5G has a Mediatek Dimensity 800. Both chipsets support Android and everyday smartphone tasks, but the Reno4 Z 5G's chipset supports 5G connectivity and pairs with its higher RAM for more demanding tasks.
Chipset
RAM
Galaxy A21s vs Oppo Reno4 Z 5G screen
Screen size, resolution and type affect how you view media, read text and interact with apps. Both phones have LCD screens but differ in sharpness and size.
Screen Resolution and Size
Oppo Reno4 Z 5G features a 1080 x 2400 resolution on a 6.57 inch screen, which delivers sharper images and more detailed visuals, suitable for watching videos and browsing. Galaxy A21s has a 720 x 1600 resolution on a slightly larger 6.5 inch screen, which still offers a clear display for everyday use.
Screen Type
Galaxy A21s uses a PLS LCD screen while Oppo Reno4 Z 5G has an IPS LCD. Both provide good colour and brightness but IPS LCD generally offers wider viewing angles and better colour accuracy.
Refresh rate
Resolution
Screen size
Screen type
Galaxy A21s vs Oppo Reno4 Z 5G camera
Camera quality and audiovisual features shape your photo and video experiences. Both phones have the same main camera resolution, but the front cameras differ.
Front Camera
Oppo Reno4 Z 5G has a 16 megapixel front camera for capturing selfies with more detail. Galaxy A21s offers a 13 megapixel front camera, which suits standard selfie and video call needs.
Main Camera
Both devices have a 48 megapixel main camera, which captures detailed photos and videos. This makes either phone capable of good everyday photography.
Front camera
Main camera
Galaxy A21s vs Oppo Reno4 Z 5G size and design
Other important features include network support, physical design and storage expandability, which influence connectivity and device handling.
Network Compatibility
Oppo Reno4 Z 5G supports 5G networks, offering faster mobile internet speeds where 5G coverage is available. Galaxy A21s supports 4G networks, suitable for users in areas where 5G is not accessible or for everyday internet use.
Storage Expansion
Galaxy A21s includes a microSDXC slot, allowing you to add extra storage with a memory card, ideal if you want to store more photos, videos or apps without relying solely on internal memory.
SIM Cards
Oppo Reno4 Z 5G supports dual physical SIM cards, which is useful if you want to manage two phone numbers or plans on one device. Galaxy A21s has a single physical SIM slot.
Size and Weight
Oppo Reno4 Z 5G is slightly slimmer at 8.1 mm depth and lighter at 184 g, making it a bit easier to hold and carry. Galaxy A21s is 8.9 mm deep and weighs 192 g, which may feel a little bulkier but still manageable.
Carrier compatibility
Depth
Height
Mobile network
Release date
SD card slot
SIM card
Weight
Width
Galaxy A21s or Oppo Reno4 Z 5G: which should you buy?
Buy the Galaxy A21s if
- you want to spend less: it starts at £60.24, £44.76 less than the Oppo Reno4 Z 5G
- you want a bigger battery (5000 mAh vs 4000 mAh)
- you want a memory card slot
Buy the Oppo Reno4 Z 5G if
- you want more RAM (8 GB vs 3 GB)
- you want a higher-resolution front camera (16 megapixels vs 13 megapixels)
- you want 5G
Galaxy A21s vs Oppo Reno4 Z 5G FAQs
Galaxy A21s vs Oppo Reno4 Z 5G comes down to the chipset, RAM and battery. Chipset: Exynos 850 on the Galaxy A21s, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G. The Oppo Reno4 Z 5G has more RAM: 8 GB vs 3 GB.
The Galaxy A21s is cheaper refurbished, from £60.24 compared with £105 for the Oppo Reno4 Z 5G.
The Galaxy A21s has a bigger battery: 5000 mAh vs 4000 mAh.
Both have the same main camera: 48 megapixels.
The Galaxy A21s no longer gets updates. We don't have published update dates for the Oppo Reno4 Z 5G.
Refurbished, the Galaxy A21s comes in 32GB and 64GB, and the Oppo Reno4 Z 5G in 128GB.
