Xiaomi Redmi 12 5G vs Xiaomi Redmi A3 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date August 4, 2023 February 23, 2024
Release Year 2023 2024

Physical

Volume 105.49 cm³ 106.58 cm³
Screen Size to Weight Ratio 3.41 "/g 3.48 "/g
Weight 199 g 193 g
Height 168.6 mm 168.3 mm
Width 76.3 mm 76.3 mm
Thickness 8.2 mm 8.3 mm
Foldable Design No No
Available Colors
  • Moonstone Silver
  • Jade Black
  • Pastel Blue
  • Midnight Black
  • Forest Green (Olive Green)
  • Star Blue (Lake Blue)

Display

Screen Size 6.79 " 6.71 "
Resolution 1080 x 2460 720 x 1650
Aspect Ratio 21:9 21:9
Screen-to-Body Ratio 85.1 % 82.9 %
Pixel Density 396 PPI 268 PPI
Refresh Rate 90 Hz 90 Hz
Typical Brightness 550 nits N/A
HBM Brightness N/A 500 nits
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 108.45 mAh/in² 111.05 mAh/in²
Battery Density 47.4 mAh/cm³ 46.91 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support No Yes
Chipset Qualcomm SM4450 Snapdragon 4 Gen 2 (4 nm) Mediatek Helio G36 (12 nm)
CPU Octa-core (2x2.2 GHz Cortex-A78 & 6x1.95 GHz Cortex-A55) Octa-core (4x2.2 GHz Cortex-A53 & 4x1.6 GHz Cortex-A53)
GPU Adreno 613 PowerVR GE8320

Connectivity

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

Software

Operating System Android Android
Initial OS Version 13 14
Maximum OS Version 14

Comparison Summary

1. Specifications Comparison

FeatureXiaomi Redmi 12 5GXiaomi Redmi A3Practical Impact
Design
Dimensions (mm)168.6 x 76.3 x 8.2168.3 x 76.3 x 8.3Virtually identical in size and feel.
Weight (g)199193Negligible weight difference.
Display
Size (inches)6.796.71Redmi 12 5G slightly larger.
TypeIPS LCD, 90HzIPS LCD, 90HzBoth offer smooth scrolling.
Resolution1080 x 2460720 x 1650Redmi 12 5G significantly sharper; sharper text and images.
PPI396268Noticeable difference in sharpness; Redmi A3 may appear pixelated.
Brightness (nits)550500Redmi 12 5G slightly brighter, potentially better visibility outdoors.
Performance
ChipsetSnapdragon 4 Gen 2 (4nm)Helio G36 (12nm)Redmi 12 5G offers significantly better performance and efficiency.
CPUOcta-core (2x2.2 GHz A78 & 6x1.95 GHz A55)Octa-core (8x2.2 GHz A53)Redmi 12 5G has more powerful cores for demanding tasks.
GPUAdreno 613PowerVR GE8320Redmi 12 5G provides a smoother gaming and multitasking experience.
RAM6GB4GB/6GB6GB RAM on both configurations of the Redmi 12 5G provides better multitasking.
Storage128GB128GBComparable storage.
Connectivity
5GYesNoFuture-proofing and faster data speeds on the Redmi 12 5G.
NFCNoYesRedmi A3 enables contactless payments.
USBUSB Type-CUSB Type-C 2.0No practical difference in most use cases.
Other
OSAndroid 13Android 14Redmi A3 ships with a newer Android version.
Battery5000 mAh5000 mAhSimilar battery life expected.
PriceMediumLowRedmi A3 is more budget-friendly.

2. Key Differences Analysis

Redmi 12 5G Advantages:

  • Significantly better performance: The Snapdragon 4 Gen 2 and Adreno 613 provide a much smoother experience for gaming, multitasking, and demanding applications.
  • Sharper display: Higher resolution and PPI result in clearer text and images.
  • 5G connectivity: Future-proofs the device and offers faster data speeds where available.

Redmi A3 Advantages:

  • Lower price: More budget-friendly option.
  • NFC: Enables contactless payments and other NFC functionalities.
  • Newer Android version: Ships with Android 14 out of the box.

Trade-offs:

  • Redmi 12 5G: Lacks NFC for contactless payments. Higher price.
  • Redmi A3: Significantly lower performance, less sharp display, no 5G.

3. User Profiles & Recommendations

Redmi 12 5G: Users who prioritize performance, a smooth user experience, and a sharp display. Suitable for gaming, multitasking, and media consumption.

Redmi A3: Budget-conscious users who prioritize basic functionality and NFC for contactless payments. Suitable for light usage, such as calling, texting, and browsing.

4. Decision Framework

Key Questions:

  1. What is your budget? The Redmi A3 is significantly cheaper.
  2. What are your performance requirements? For demanding tasks, the Redmi 12 5G is far superior.
  3. Is 5G or NFC more important to you? The Redmi 12 5G offers 5G, while the Redmi A3 has NFC.

Scenario-Based Recommendations:

  • Limited budget, light usage: Redmi A3
  • Moderate budget, focus on performance: Redmi 12 5G
  • Need for future-proof connectivity: Redmi 12 5G
  • Essential NFC for payments: Redmi A3

My Choice: Xiaomi Redmi 12 5G

While the Redmi A3 is more affordable, the performance difference due to the Snapdragon 4 Gen 2 vs. the Helio G36 is significant. The sharper display on the Redmi 12 5G is also a major factor for a better user experience. 5G connectivity offers future-proofing. While I would miss NFC, I prioritize the smoother, faster experience and better display quality offered by the Redmi 12 5G. I can use alternative payment methods until upgrading to a phone with both 5G and NFC becomes more affordable.

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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