Xiaomi Redmi 9C vs Oppo A57 4G - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date August 12, 2020 June 6, 2022
Release Year 2020 2022

Physical

Volume 114.28 cm³ 98.22 cm³
Screen Size to Weight Ratio 3.33 "/g 3.51 "/g
Weight 196 g 187 g
Height 164.9 mm 163.7 mm
Width 77 mm 75 mm
Thickness 9 mm 8 mm
Foldable Design No No
Available Colors
  • Midnight Gray
  • Sunrise Orange
  • Twilight Blue
  • Glowing Black
  • Glowing Green

Display

Screen Size 6.53 " 6.56 "
Resolution 720 x 1600 720 x 1612
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 81.1 % 84.2 %
Pixel Density 269 PPI 269 PPI
Refresh Rate N/A N/A
Typical Brightness 400 nits N/A
HBM Brightness N/A N/A
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 117.26 mAh/in² 116.19 mAh/in²
Battery Density 43.75 mAh/cm³ 50.91 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support No No
Chipset Mediatek MT6765G Helio G35 (12 nm) Mediatek MT6765G Helio G35 (12 nm)
CPU Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
GPU PowerVR GE8320 PowerVR GE8320

Connectivity

USB Version 2.0 2.0
OTG Support 1 1
DisplayPort
DisplayPort Version N/A N/A
USB Features microUSB 2.0, OTG USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 10 12
Maximum OS Version 14

Comparison Summary

1. Specifications Comparison

Design

FeatureXiaomi Redmi 9COppo A57 4GPractical Impact
Dimensions164.9 × 77 × 9 mm163.7 × 75 × 8 mmThe Oppo A57 4G is slightly more compact and thinner, potentially making it easier to hold and pocket. The Redmi 9C is a bit bulkier.
Weight196g187gThe Oppo A57 4G is slightly lighter, which can be noticeable during prolonged use.
BuildStandardStandardBoth are standard builds, likely plastic frames and backs. Don't expect premium materials.

Display

FeatureXiaomi Redmi 9COppo A57 4GPractical Impact
Size6.53"6.56"The difference in screen size is negligible and won't be noticeable in everyday use.
Resolution720x1600720x1612Both have HD+ resolution, which is adequate for basic tasks but may not be the sharpest for multimedia consumption. Pixel density is the same, so clarity is similar.
PPI269269Identical sharpness; text and images will appear similarly defined on both screens.
TechnologyIPS LCDIPS LCDBoth offer decent color accuracy and viewing angles, suitable for general use.
Refresh Rate60Hz60HzStandard smoothness for everyday tasks. Not ideal for gaming or fast-paced content.
Brightness0 nits0 nitsBrightness information is missing. Hard to know how well either performs in direct sunlight.

Performance

FeatureXiaomi Redmi 9COppo A57 4GPractical Impact
ChipsetMediatek MT6765G Helio G35 (12 nm)Mediatek MT6765G Helio G35 (12 nm)Identical chipsets mean similar performance for basic tasks like browsing, social media, and light gaming. Expect some lag with demanding apps or multitasking.
AnTuTu Score110,490110,000The nearly identical AnTuTu scores confirm very similar performance.
GPUPowerVR GE8320 (IMG PowerVR GE8320)PowerVR GE8320 (IMG PowerVR GE8320)Gaming performance will be similar, meaning only very basic games will run smoothly.

Camera

FeatureXiaomi Redmi 9COppo A57 4GPractical Impact
Main Camera13MP, f/2.213MP, f/2.2Similar main camera performance; expect decent photos in good lighting but struggles in low light.
Selfie Camera5MP, f/2.28MP, f/2.0The Oppo A57 4G should take slightly better selfies due to the higher resolution and wider aperture (allowing more light).
Portrait Mode2MP, f/2.42MP, f/2.4Both have dedicated depth sensors for portrait mode with similar performance.
Macro Lens2MP, f/2.42MP, f/2.4Low-resolution macro lenses are present on both, providing limited detail in close-up shots.
Video1080p@30fps1080p@30fpsBoth record video at the same resolution and frame rate. The Oppo A57 4G offers slow-motion at 120fps, which is a nice addition.
FeaturesDigital zoom, Triple camera, Autofocus, Touch focus, Manual focus, Continuous shooting, Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timerTriple camera, Digital image stabilization, Autofocus, Touch focus, Manual focus, Phase detection autofocus (PDAF), Geotagging, Panorama, HDR, Face detection, White balance settings, ISO settings, Exposure compensation, Scene mode, Self-timerThe Oppo A57 4G's digital image stabilization (DIS) can help reduce shakiness in videos. PDAF allows for faster and more accurate autofocus. The Redmi 9C offers continuous shooting for capturing fast-moving subjects.

Battery

FeatureXiaomi Redmi 9COppo A57 4GPractical Impact
Capacity5000mAh5000mAhBoth offer excellent battery life, easily lasting a full day for most users.
Charging10W fast charging33W fast chargingThe Oppo A57 4G charges significantly faster, which is a major advantage. It can fully charge much quicker than the Redmi 9C.

2. Key Differences Analysis

Xiaomi Redmi 9C Advantages:

  • Potentially Cheaper: Older model so likely to be available at a lower price point (market dependent).
  • Magnetometer Sensor: Can be useful for compass and mapping applications

Practical Implications: The Redmi 9C might appeal to users on the tightest budget who don't mind slower charging and slightly outdated software.

Oppo A57 4G Advantages:

  • Faster Charging (33W): Significantly reduces charging time.
  • Newer Android Version (Android 12, Upgradeable to 14): Longer software support and access to newer features.
  • Better Selfie Camera (8MP vs 5MP): Improved selfie quality.
  • Digital Image Stabilization (DIS): Reduces shakiness in videos.
  • Stereo Speakers: Better sound quality.
  • More Advanced Bluetooth (5.1): Potentially more stable and efficient Bluetooth connections.
  • More GPS Systems (QZSS, Galileo): Potentially more accurate GPS.
  • Gyroscope Sensor: Enables more advanced motion-sensing applications and gaming experiences.

Practical Implications: The Oppo A57 4G offers a more modern user experience with faster charging, better software support, and enhanced features.

3. User Profiles & Recommendations

Xiaomi Redmi 9C:

  • Ideal User: Extremely budget-conscious users who primarily need a phone for basic communication (calls, texts) and don't prioritize advanced features.
  • Use Cases:
    • Backup phone
    • First phone for a child
    • Basic phone for elderly users

Oppo A57 4G:

  • Ideal User: Users who want a reliable and feature-rich phone without breaking the bank. Those who value faster charging, better selfies, and a more modern Android experience.
  • Use Cases:
    • Daily driver for general use (social media, browsing, communication)
    • Multimedia consumption (videos, music)
    • Casual gaming

4. Decision Framework

Consider these questions before purchasing:

  1. What is your absolute maximum budget? If the Redmi 9C is significantly cheaper, it might be the only option.
  2. How important is fast charging to you? The Oppo A57 4G's 33W charging is a significant advantage.
  3. How long do you plan to use the phone? The Oppo A57 4G's newer Android version ensures longer software support.

Scenario-Based Recommendations:

  • Scenario 1: Tight Budget, Basic Needs: Choose the Xiaomi Redmi 9C if it's significantly cheaper and you only need basic functionality.
  • Scenario 2: Balanced Budget, Daily Use: Choose the Oppo A57 4G for its faster charging, better software, and improved features.

What I would choose and why!

If I were choosing between these two phones, I would pick the Oppo A57 4G. While both phones share a similar chipset and battery capacity, the Oppo A57 4G offers several key advantages that enhance the overall user experience.

The most significant factor is the 33W fast charging. This feature dramatically reduces the time spent waiting for the phone to charge, which is a huge convenience in daily life. Additionally, the newer Android version (Android 12, upgradeable to 14) ensures longer software support and access to the latest features and security updates. The 8MP selfie camera on the Oppo A57 4G will also provide better image quality for selfies and video calls. Finally, the stereo speakers offer a more immersive audio experience.

Although both phones offer comparable performance for basic tasks, the additional features and enhancements of the Oppo A57 4G make it the better choice for a more modern and enjoyable smartphone experience.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

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