Galaxy A21 vs Oppo Reno4 Z 5G
Shop Samsung Galaxy
Galaxy A21
Starting at
£120.18£152.00 new
Oppo Reno4 Z 5G
Starting at
£105.00What's the difference between the Galaxy A21 and Oppo Reno4 Z 5G?
Galaxy A21 vs Oppo Reno4 Z 5G comes down to the chipset, RAM and screen size. Refurbished, the Oppo Reno4 Z 5G starts at £105, £15.18 less than the Galaxy A21.
Refurbished from
Chipset
RAM
Screen size
Refresh rate
Main camera
- Chipset: Mediatek MT6765 Helio P35 (12 nm) on the Galaxy A21, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G.
- The Oppo Reno4 Z 5G has more RAM: 8 GB vs 3 GB.
- Screen size: 6.5 inch on the Galaxy A21, 6.57 inch on the Oppo Reno4 Z 5G.
Galaxy A21 vs Oppo Reno4 Z 5G specs
The Galaxy A21 and Oppo Reno4 Z 5G both come from 2020 and share the same battery capacity and Android OS. The Galaxy A21 suits everyday use with simpler performance, a larger 6.5 inch screen at 60 Hz, and expandable storage via microSDXC. The Oppo Reno4 Z 5G is aimed at users who want more power and speed, with 8 GB RAM, a higher resolution 6.57 inch screen at 120 Hz, and 5G connectivity. It also offers sharper cameras and dual SIM support but no expandable storage. Your choice depends on whether you prioritise multitasking and network speed or prefer microSD storage and a slightly lighter device.
Galaxy A21 vs Oppo Reno4 Z 5G price
Colour
- WhiteSold out
Storage
- 128GBSold out
Galaxy A21 vs Oppo Reno4 Z 5G battery life and software updates
Durability covers battery capacity, operating system, and update support. Both phones share the same battery size and come with Android, so daily power and software basics are similar.
Battery Capacity
Both the Galaxy A21 and Oppo Reno4 Z 5G have a 4000 mAh battery. This means you can expect similar battery life under typical use, whether you are browsing, streaming or using apps.
Software Updates
This means both phones run on their original Android versions without official access to the newest system features or security patches.
Battery
Foldable
Software updates
Year of release
Galaxy A21 vs Oppo Reno4 Z 5G performance
Performance is defined by chipset, RAM and storage. The Oppo Reno4 Z 5G is geared more towards users who want smoother multitasking and faster app handling, while the Galaxy A21 fits everyday tasks well.
Chipset Power
The Galaxy A21 uses a Mediatek MT6765 Helio P35 chipset, suitable for daily tasks and basic apps. The Oppo Reno4 Z 5G features a Mediatek Dimensity 800 chipset, which supports more demanding apps and smoother performance.
RAM Capacity
With 3 GB RAM, the Galaxy A21 keeps everyday apps running adequately. The Oppo Reno4 Z 5G has 8 GB RAM, which helps you keep multiple apps open and switch between them smoothly.
Storage Size
The Galaxy A21 comes with 32GB storage, enough for moderate app use and media. The Oppo Reno4 Z 5G offers 128GB, giving you plenty of room for apps, photos and videos without needing to manage space frequently.
Chipset
RAM
Galaxy A21 vs Oppo Reno4 Z 5G screen
Screen quality affects how you view content and interact with your phone. The Oppo Reno4 Z 5G offers a sharper and smoother display, which benefits media and gaming, while the Galaxy A21 provides a larger screen for basic viewing needs.
Screen Size
The Galaxy A21 has a 6.5 inch screen, giving you a bit more room for watching videos and browsing. The Oppo Reno4 Z 5G screen measures 6.57 inch, just slightly smaller but still spacious.
Refresh Rate
The Galaxy A21 screen refreshes at 60 Hz, which is standard for everyday use. The Oppo Reno4 Z 5G doubles this at 120 Hz, making scrolling and animations look noticeably smoother.
Screen Resolution
The Galaxy A21 displays at 720 x 1600 resolution, suitable for routine tasks. The Oppo Reno4 Z 5G offers a higher 1080 x 2400 resolution, which provides clearer text and more detailed images.
Refresh rate
Resolution
Screen size
Screen type
Galaxy A21 vs Oppo Reno4 Z 5G camera
Camera quality is important for capturing photos and selfies. The Oppo Reno4 Z 5G offers higher megapixel counts on both front and main cameras, which helps capture more detail in your images.
Front Camera
The Galaxy A21 has a 13 megapixel front camera, good for video calls and selfies. The Oppo Reno4 Z 5G increases this to 16 megapixels, which can capture finer detail in your self-portraits.
Main Camera
For main photos, the Galaxy A21 has a 16 megapixel camera. The Oppo Reno4 Z 5G features a 48 megapixel main camera, better suited to capturing sharper and more detailed pictures.
Front camera
Main camera
Galaxy A21 vs Oppo Reno4 Z 5G size and design
Other features include network support, SIM options, and physical dimensions. These affect connectivity, convenience, and how the device feels in your hand.
Mobile Network
The Galaxy A21 supports 4G networks, suitable for everyday internet use. The Oppo Reno4 Z 5G supports 5G, benefiting users who want faster mobile data speeds where 5G is available.
SIM Card Options
The Galaxy A21 uses a single physical SIM card, which works well if you only need one number. The Oppo Reno4 Z 5G has dual physical SIM slots, ideal for managing two numbers or plans on one device.
Expandable Storage
The Galaxy A21 includes a microSDXC slot, so you can add extra storage as needed. The Oppo Reno4 Z 5G does not offer a microSD slot, so you rely on its built-in storage.
Device Size and Weight
The Galaxy A21 measures 150 mm tall, 71 mm wide, and 8.4 mm deep, weighing 159 g. The Oppo Reno4 Z 5G is slightly taller at 163.8 mm, wider at 75.5 mm, and 8.1 mm deep, weighing 184 g. The Galaxy A21 is lighter and thinner, which may suit those preferring a lighter phone.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
Weight
Width
Galaxy A21 or Oppo Reno4 Z 5G: which should you buy?
Buy the Galaxy A21 if
- you want a lighter build (159 g vs 184 g)
- you want a memory card slot
Buy the Oppo Reno4 Z 5G if
- you want to spend less: it starts at £105, £15.18 less than the Galaxy A21
- you want more RAM (8 GB vs 3 GB)
- you want a smoother screen (120 Hz vs 60 Hz)
Galaxy A21 vs Oppo Reno4 Z 5G FAQs
Galaxy A21 vs Oppo Reno4 Z 5G comes down to the chipset, RAM and screen size. Chipset: Mediatek MT6765 Helio P35 (12 nm) on the Galaxy A21, Mediatek Dimensity 800 on the Oppo Reno4 Z 5G. The Oppo Reno4 Z 5G has more RAM: 8 GB vs 3 GB.
The Oppo Reno4 Z 5G is cheaper refurbished, from £105 compared with £120.18 for the Galaxy A21.
Both have the same battery: 4000 mAh.
The Oppo Reno4 Z 5G has a higher-resolution main camera: 48 megapixels vs 16 megapixels.
The Galaxy A21 no longer gets updates. We don't have published update dates for the Oppo Reno4 Z 5G.
Refurbished, the Galaxy A21 comes in 32GB, and the Oppo Reno4 Z 5G in 128GB.
