Oppo Reno6 5G vs Xiaomi Redmi A3x - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date June 11, 2021 May 24, 2024
Release Year 2021 2024

Physical

Volume 85.92 cm³ 106.65 cm³
Screen Size to Weight Ratio 3.53 "/g 3.48 "/g
Weight 182 g 193 g
Height 156.8 mm 168.4 mm
Width 72.1 mm 76.3 mm
Thickness 7.6 mm 8.3 mm
Foldable Design No No
Available Colors
  • Blue
  • Aurora
  • Purple
  • Stellar Black
  • Midnight Black
  • Olive Green
  • Moonlight White (Starry White)
  • Aurora Green (Ocean Green)

Display

Screen Size 6.43 " 6.71 "
Resolution 1080 x 2400 720 x 1650
Aspect Ratio 20:9 21:9
Screen-to-Body Ratio 88.3 % 82.9 %
Pixel Density 409 PPI 268 PPI
Refresh Rate 90 Hz 90 Hz
Typical Brightness 430 nits 500 nits
HBM Brightness 600 nits N/A
Peak Brightness 750 nits N/A

Hardware

Battery Capacity per Screen Area 104.00 mAh/in² 111.05 mAh/in²
Battery Density 50.05 mAh/cm³ 46.88 mAh/cm³
Battery Capacity 4300 mAh 5000 mAh
NFC Support Yes No
Chipset Mediatek Dimensity 900 (6 nm) Unisoc T603 (22 nm)
CPU Octa-core (2x2.4 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55) Octa-core 1.8 GHz
GPU Mali-G68 MC4 8

Connectivity

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

Software

Operating System Android Android
Initial OS Version 11 14
Maximum OS Version 12 16

Comparison Summary

Oppo Reno6 5G vs Xiaomi Redmi A3x: A Practical Comparison

1. Specifications Breakdown

Design & Build

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
Dimensions156.8 × 72.1 × 7.6 mm168.4 × 76.3 × 8.3 mmReno6 5G is more compact and slimmer, making it easier to handle. A3x is bulkier but may feel more durable.
Weight182g193gReno6 is lighter—noticeable in long-term use, but A3x’s extra heft may suggest sturdier construction.
Screen ProtectionGorilla Glass 5Gorilla Glass 3Reno6 has better scratch/drop resistance, important for durability.

Display

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
Size6.43" AMOLED6.71" IPS LCDA3x has a larger screen, but Reno6’s AMOLED offers richer colors, deeper blacks, and better contrast.
Resolution1080x2400 (409 PPI)720x1650 (268 PPI)Reno6’s higher resolution means sharper text, smoother icons—ideal for media consumption. A3x’s lower res may appear pixelated.
Refresh Rate90Hz90HzBoth offer smooth scrolling, but Reno6’s AMOLED makes motion appear even smoother.
Brightness1100 nits (peak)~500 nits (estimated)Reno6 is far superior outdoors—easier to read in sunlight.

Performance

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
ChipsetDimensity 900 (6nm)Unisoc T603 (22nm)Reno6’s chipset is vastly superior—faster, more efficient. A3x struggles with heavy tasks.
Antutu Score815,200239,000Reno6 is 3.4x faster—better for gaming, multitasking, and future-proofing.
RAM8GB/12GB3GB/4GBReno6 handles more apps simultaneously; A3x may lag with heavy usage.
Storage128GB/256GB64GB/128GBReno6 offers more space—better for apps, photos, and videos.

Camera

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
Main Camera50MP (f/1.8, Sony IMX766)8MP (f/2.2)Reno6 captures 6x more detail—better in low light, sharper images. A3x is basic.
Ultra-Wide16MPNoneReno6 offers real versatility—better for landscapes and group shots.
Selfie Camera32MP5MPReno6’s selfies are far sharper—great for social media. A3x is basic.
Video Recording4K@30fps, 1080p@60fps1080p@30fpsReno6 supports high-quality video, slow-mo (240fps), and stabilization.

Battery & Charging

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
Capacity4500mAh5000mAhA3x lasts longer (11% bigger battery), but Reno6’s efficiency helps compensate.
Charging Speed65W (0-100% in ~30min)10W (slow charging)Reno6 charges 6.5x faster—huge advantage if you hate waiting.

Software & Extras

FeatureOppo Reno6 5GXiaomi Redmi A3xReal-World Implications
OSAndroid 11 (upgradable to 12)Android 14 (upgradable to 16)A3x has newer OS, but Reno6’s hardware makes it smoother.
ConnectivityWiFi 6, BT 5.2, Dual GPSWiFi 5, BT 4.2, Basic GPSReno6 has better network speed, Bluetooth audio quality, and location accuracy.

2. Key Insights

Oppo Reno6 5G Strengths:

Performance Beast – Far superior chipset, more RAM, and storage.
Best Display – AMOLED with 1080p, 1100 nits brightness, and smooth 90Hz.
Top-Tier Camera – 50MP main sensor, ultra-wide, and 4K video.
Blazing Charging – 65W fast charging is a game-changer.

Xiaomi Redmi A3x Strengths:

Bigger Battery – 5000mAh lasts longer (though charging is slow).
Newer OS – Android 14 out of the box (but hardware holds it back).
Larger Screen – 6.71" (though lower quality than Reno6).

Biggest Trade-offs:

  • Reno6 5G → Older OS (but smoother performance).
  • Redmi A3x → Weak performance, mediocre camera, slow charging.

3. User Profiles & Recommendations

Who Should Buy the Oppo Reno6 5G?

Power users – Need speed, multitasking, gaming.
Photography enthusiasts – Want high-quality photos and videos.
Tech lovers – Prefer AMOLED, fast charging, premium feel.

Who Should Buy the Xiaomi Redmi A3x?

Budget-focused users – If price is the #1 factor.
Casual users – Just need calls, WhatsApp, and light browsing.
Long-battery seekers – If 5000mAh is a must (but accept slow charging).


4. Buying Decision Framework

Ask Yourself:

  1. Do you care about performance and speed?Reno6 5G.
  2. Do you prioritize battery life over everything else?A3x.
  3. Do you want the best screen and camera?Reno6 5G.

Scenario-Based Recommendations:

  • Student on a budget who just needs basics? → A3x.
  • Gamer/content creator? → Reno6 5G.
  • Outdoor photographer? → Reno6 5G (bright screen, great camera).

Final Verdict: Which Would I Choose?

Winner: Oppo Reno6 5G 🏆

Despite being older, the Reno6 5G is the clear winner in almost every meaningful category—performance, display, camera, and charging speed. The Redmi A3x is only better in battery capacity and OS version, but its weak chipset and low-res screen make it a poor choice for anything beyond basic use.

If you can stretch your budget, the Reno6 5G offers far better long-term value. The A3x is only worth considering if you absolutely need a cheap phone with a big battery—but expect compromises everywhere else.

My pick? Oppo Reno6 5G, no contest. 🔥

Alex Griffin
Alex Griffin

Technology analyst specializing in mobile devices and consumer electronics.

Core Expertise

  • Mobile technology analysis
  • Consumer electronics evaluation
  • Technical specification interpretation
  • User experience insights

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