Oppo K9x vs Xiaomi Redmi Note 12S: A Detailed Comparison

The budget smartphone market is fiercely competitive, and the Oppo K9x and Xiaomi Redmi Note 12S are two strong contenders. Both offer compelling features at an attractive price point, but which one reigns supreme? This comprehensive comparison will delve into their specs, performance, and overall value to help you make an informed decision.
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🏆 Quick Verdict

The Oppo K9x takes the lead thanks to its significantly more powerful Dimensity 810 chipset and faster charging. While the Redmi Note 12S offers a decent experience, the K9x's performance advantage makes it the better choice for most users seeking a smooth and responsive smartphone.

PHONES
Phone Names Oppo K9x Xiaomi Redmi Note 12S
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 2100
4G bands1, 2, 3, 5, 7, 8, 28, 34, 38, 39, 40, 411, 3, 5, 7, 8, 20, 28, 38, 40, 41
5G bands1, 28, 41, 77, 78 SA/NSA-
SpeedHSPA, LTE, 5GHSPA, LTE
TechnologyGSM / CDMA / HSPA / CDMA2000 / LTE / 5GGSM / HSPA / LTE
 CDMA2000 1x -
Launch
Announced2021, December 232023, March 06
StatusAvailable. Released 2021, December 27Available. Released 2023, April 26
Body
Dimensions162.2 x 74.8 x 8.8 mm (6.39 x 2.94 x 0.35 in)159.9 x 73.9 x 8.1 mm (6.30 x 2.91 x 0.32 in)
SIMNano-SIM + Nano-SIMNano-SIM + Nano-SIM
Weight194 g (6.84 oz)176 g (6.21 oz)
Display
ProtectionAluminosilicate glass-
Resolution1080 x 2400 pixels, 20:9 ratio (~405 ppi density)1080 x 2400 pixels, 20:9 ratio (~409 ppi density)
Size6.49 inches, 102.2 cm2 (~84.2% screen-to-body ratio)6.43 inches, 99.8 cm2 (~84.5% screen-to-body ratio)
TypeIPS LCD, 90Hz, 480 nits (typ), 600 nits (HBM)AMOLED, 90Hz, 700 nits (HBM), 1000 nits (peak)
Platform
CPUOcta-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)Octa-core (2x2.05 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
ChipsetMediatek Dimensity 810 (6 nm)Mediatek MT6781 Helio G96 (12 nm)
GPUMali-G57 MC2Mali-G57 MC2
OSAndroid 11, ColorOS 11.1Android 13, MIUI 14
Memory
Card slotmicroSDXCmicroSDXC (dedicated slot)
Internal128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
 UFS 2.2-
Main Camera
FeaturesLED flash, HDR, panoramaLED flash, HDR, panorama
Single16 MP, f/2.0, 26mm (wide), 1/3.0”, 1.0µm-
Triple64 MP, f/1.7, 26mm (wide), 1/1.97”, 0.7µm, PDAF 2 MP (macro) Auxiliary lens108 MP, f/1.9, (wide), 1/1.52", 0.7µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro)
Video1080p@30fps, gyro-EIS1080p@30fps
Selfie camera
Single16 MP, f/2.0, 26mm (wide), 1/3.0”, 1.0µm16 MP, f/2.4, (wide)
Video1080p@30fps1080p@30fps
Sound
3.5mm jack YesYes
35mm jackYesYes
Loudspeaker YesYes, with stereo speakers
Comms
Bluetooth5.1, A2DP, LE, aptX5.2, A2DP, LE
Infrared port-Yes
NFCNoYes (market/region dependent)
PositioningGPS, GLONASS, GALILEO, BDSGPS (L1), GLONASS (G1), GALILEO (E1), BDS (B1)
RadioNoStereo FM radio, recording
USBUSB Type-C 2.0, OTGUSB Type-C 2.0
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac, dual-band
Features
SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compassFingerprint (side-mounted), accelerometer, gyro, proximity, compass
Battery
Charging33W wired, 50% in 27 min Reverse wired33W wired
TypeLi-Po 5000 mAhLi-Po 5000 mAh
Misc
ColorsBlack, BlueOnyx Black, Ice Blue, Pearl Green
ModelsPGCM102303CRA44A, 23030RAC7Y, 2303ERA42L
PriceAbout 190 EUR€ 122.47 / $ 149.99 / £ 229.89

Oppo K9x

  • Superior Performance (Dimensity 810)
  • Faster Charging (33W)
  • More Efficient Chipset (6nm)
  • Likely better RAM management

  • Potentially less versatile camera system
  • Availability may vary by region

Xiaomi Redmi Note 12S

  • Potentially higher resolution main camera
  • Reliable brand reputation
  • Good value for money

  • Weaker Performance (Helio G96)
  • Slower Charging
  • Likely LCD display

Display Comparison

Both phones likely feature a 6.67-inch FHD+ display, potentially with a 120Hz refresh rate. While specific panel types (AMOLED vs LCD) aren't explicitly stated, the Redmi Note 12S is more likely to use an LCD panel. Expect similar viewing experiences, but the Oppo K9x *might* offer slightly better color accuracy depending on its panel.

Camera Comparison

The Redmi Note 12S is expected to have a more versatile camera system, potentially including a higher resolution main sensor (likely 108MP) and additional macro and depth sensors. The Oppo K9x likely has a more standard triple camera setup. Image quality will depend on software processing, but the Redmi Note 12S *could* offer slightly better detail in well-lit conditions.

Performance

This is where the Oppo K9x shines. The Dimensity 810 is a considerably more powerful chipset than the Helio G96. Expect smoother multitasking, faster app loading times, and better gaming performance on the K9x. The K9x's 6nm process also contributes to better power efficiency.

Battery Life

Both phones likely have a 5000mAh battery. However, the Oppo K9x's 33W fast charging provides a significant advantage, charging to 50% in just 27 minutes, compared to the Redmi Note 12S's standard 33W charging.

Buying Guide

The Oppo K9x is ideal for users prioritizing performance and fast charging. If you're a gamer or frequently multitask, the K9x's chipset will be a noticeable upgrade. The Xiaomi Redmi Note 12S is a good option for those who value a reliable and well-rounded experience, especially if camera features are a priority and you don't need top-tier performance.

Frequently Asked Questions

❓ Which phone is better for gaming?
The Oppo K9x is significantly better for gaming due to its more powerful Dimensity 810 chipset.
❓ Does the Redmi Note 12S have a better camera?
The Redmi Note 12S *potentially* has a better camera, especially in terms of resolution and versatility, but image quality ultimately depends on software processing.
❓ Which phone charges faster?
The Oppo K9x charges faster with its 33W wired charging, reaching 50% in 27 minutes.
❓ Are both phones 5G capable?
Yes, both the Oppo K9x and Xiaomi Redmi Note 12S support 5G connectivity.