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Asus Zenfone 3 Ultra (ZU680KL 32GB) vs Xiaomi Redmi Note 9S (128GB)

Side by side comparison between Asus Zenfone 3 Ultra vs Xiaomi Redmi Note 9S phones, differences, pros, cons and full specifications. What's the better?

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Compare Xiaomi Redmi Note 9S X Asus Zenfone 3 Ultra (ZU680KL 32GB) 04Points
6.8"
IPS+

1080x1920

23
MP

8mp

3GB
RAM

Octa-core

4600
mAh

(Non removable)

vs
19Points Xiaomi Redmi Note 9S (128GB) Compare Asus Zenfone 3 Ultra X
6.67"
IPS

1080x2400

48
MP

16mp

6GB
RAM

Octa-core

5020
mAh

(Non removable)

What's the better phone? Xiaomi Redmi Note 9S (128GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

Zenfone 3 Ultra (ZU680KL 32GB)} 4 Advantages Asus Zenfone 3 Ultra (ZU680KL 32GB) vs Redmi Note 9S (128GB)} 19 Advantages Xiaomi Redmi Note 9S (128GB)
+6.8 millimeters (0.27 inches)29%
Thinner
vs8.8 millimeters (0.35 inches)
+6.8"2%
Larger screen
vs6.67"
+Dual-LED flashAdvantage
The Dual-LED flash helps in dark places or in low light
vsLED flash
+OIS (4-axis): Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
vsEIS: Digital stabilization
1.8GHz 64bit Octa-corevs+2.3GHz 64bit Octa-core (8nm)41%
More powerful processor, you can open your applications faster
3GB LPDDR4vs+6GB LPDDR4X100%
More RAM memory. Typically more responsive and better for multitasking.
32GB (24GB available)vs+128GB (106GB available)3 times
More internal storage for applications and files
Until 256GB microSD, microSDXCvs+Until 512GB microSD, microSDXC100%
More external storage for files using memory cards
233 grams (8.16 ounces)vs+209 grams (7.32 ounces)11%
Lighter
1080x1920 pixelsvs+1080x2400 pixels25%
Higher resolution screen
324 PPIvs+395 PPI22%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
(back) 23MPvs+(quad camera) 48MP + 8MP + 5MP + 2MP176%
Higher resolution main camera
Not supportedvs+BSI sensorAdvantage
The BSI sensor allows the entry of more light generating photos with more detail and brightness
1/2.6" inchesvs+1/2" inches30%
The larger sensor camera lets you take photos with better depth.
f/2.0 (aperture)vs+f/1.8 (aperture)11%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 8MPvs+(front) 16MP99%
Higher resolution secondary camera to take pictures and selfies
Android 8.0 Oreovs+Android 11Advantage
Android 11 is newer and safer
(4G LTE-A) 300 Mbpsvs+(4G LTE-A) 800 Mbps167%
Faster for surfing the internet and download files
Not supportedvs+Face unlock 2DAdvantage
Sensors help you use the device
4600 mAhvs+5020 mAh9%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
2 slots (Dual-SIM)
(hybrid slot/shares the same microSD slot)
vs+2 slots (Dual-SIM)
(dedicated slot)Advantage
You can have more mobile carriers/operators on the same device.
4.2 + A2DPvs+5.0 + A2DP/LEAdvantage
Bluetooth 5.0 + A2DP/LE is newer and faster
Not supportedvs+P2i certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

29 Common items in both devices
TFT Super IPS+ / TFT IPS LCD
16 million
Only digital zoom
LDAF/PDAF: laser/phase detection autofocus / PDAF: phase detection autofocus
HDR photo on both cameras
4K UHD (3840x2160)
(front) Full HD (1920x1080)
+22 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences Clear highlight

📱 Model features

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
ModelZenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Other model namesAsus Zenfone 3 Ultra 3GB/32GB ZU680KL Dual-Sim, Asus MercuryXiaomi Note 9S (M2003J6A1G Global version) 6GB RAM
Country or region available(Global, International)
(Global, International)
(Global, International)
(Global, International)
BrandAsusXiaomi
Release date8/1/20164/30/2020, Announced: 3/23/2020
Depth6.8 millimeters (0.27 inches)8.8 millimeters (0.35 inches)
Size (width x height)93.9 x 186.4 millimeters (3.7 x 7.34 in)76.68 x 165.75 millimeters (3.02 x 6.53 in)
Weight233 grams (8.16 ounces)209 grams (7.32 ounces)
Build, materialsfeature not registeredPlastic body, glass front/back
Protection against water and othersNot supportedP2i certified: water repellent nano-coating

📲 Display

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Display typeTFT Super IPS+TFT IPS LCD
Screen size6.8" inches6.67" inches
Screen-to-body ratio~72.8% (screen-to-body ratio)~84.5% (screen-to-body ratio)
Display resolution1080x1920 pixels1080x2400 pixels (20:9)
TouchscreenCapacitive Multitouch 10-pointsCapacitive Multitouch
Pixel density (dot pitch)324 PPI395 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 4Gorilla Glass 5
Refresh ratefeature not registered60Hz
Display featuresfeature not registered450nits[typ]
HDR10

🤖 Operating System

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
System versionAndroid 6.0.1 MarshmallowAndroid 10
Firmware updateAndroid 8.0 OreoAndroid 11
User Interfacefeature not registeredMIUI 11 / 12

⚙️ Processor

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Chipset64bit: Qualcomm Snapdragon 652 MSM8976 (28nm)64bit: Qualcomm Snapdragon 720G (SM7125) (8nm)
CPUOcta-core, 2 processors:
4x 1.8GHz ARM Cortex-A72 (Quad-core)
4x 1.4GHz ARM Cortex-A53 (Quad-core)
Octa-core, 2 processors:
2x 2.3GHz Kryo 465 Gold (Dual-core)
6x 1.8GHz Kryo 465 Silver (Hexa-core)
GPU graphical controllerQualcomm Adreno 510 600MhzQualcomm Adreno 618 (750MHz)
Performance (benchmark)feature not registeredAnTuTu: 279625 (v8)
Geekbench: 1785 (v5.1)
GFXBench: 15fps (ES 3.1 onscreen)

💽 Memory and storage

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
RAM memory3GB LPDDR46GB LPDDR4X
Internal storage32GB (24GB available)128GB (106GB available)
UFS 2.1
External storageUntil 256GB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot)
Until 512GB microSD, microSDXC
(dedicated slot)

📶 Mobile networks

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Dual-SIMDual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot)
Dual-SIM Standby - Call active on one sim card
(dedicated slot)
SIM card2 slots (Dual-SIM)
micro-SIM (3FF) and nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload300/50 Mbps800/150 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkGlobal version:
UMTS 800/850/900/1900/2100
China version:
CDMA2000, TD-SCDMA 1900/2000
UMTS 800/850/900/1900/2100
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat6
Global version:
LTE (Bands 1,3,5,7,8,18,19,20,26,28)
TD-LTE (Bands 38,40,41)
China version:
LTE (Bands 1,3,5,7,8,18,19,20,26,28)
TD-LTE (Bands 38,39,40,41)
LTE Cat15/13 (1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (38, 40)
VoLTE
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkNot supportedUMTS 850/900/1700/1900/2100
Secondary 4G networkNot supportedLTE Cat15/13 (1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (38, 40)
VoLTE
Secondary data networkGPRS, EDGEGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A

📷 Camera

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Back camera (main camera)23 megapixels(quad camera)
48 megapixels
8MP ultrawide f/2.213mm1/4"1.12µm119°
5MP macro f/2.41/5"1.12µmAF
2MP depth f/2.4
Main camera resolution5520x4140 pixels8000x6000 pixels
Video recording (primary)4K UHD (3840x2160) 24 fps4K UHD (3840x2160) 30 fps
FlashDual-LED flashLED flash
Focal aperturef/2.0 (aperture)f/1.8 (aperture)
Focal lengthfeature not registered26mm (lens)
Sensor size1/2.6" inches1/2" inches
Pixel size1.12µm pixel0.8µm pixel
AutofocusLDAF/PDAF: laser/phase detection autofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS (4-axis): Optical stabilizationEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedSupported
HDRHDR photo on both camerasHDR photo on both cameras
Camera extrasfeature not registered4K@30fps
1080p@30/60fps
1080p@120fps (slow motion)
720p@960fps (slow motion)

📸 Front camera

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Front camera (secondary)8 megapixels16 megapixels
Front camera resolution3264x2448 pixels4608x3456 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.0 (aperture)f/2.5 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registered1/3.06" inches
Pixel sizefeature not registered1µm pixel

🔉 Sound and multimedia

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
LoudspeakerSupportedMono sound (not stereo)
Active noise cancellation2 microphones or more2 microphones or more
RadioFM (RDS)FM
TVNot supportedNot supported
Video formatsMP4, H.264, H.263MP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
USBUSB 2.0 Type-C reversible connectorUSB 2.0 Type-C, USB OTG On-The-Go
Audio output3.5mm jack3.5mm jack
TV outputUSB Type-C SlimPort®USB Type-C (reversible)
Bluetooth4.2 + A2DP5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz)
WiFi Direct, hotspot
802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASS, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFCNot supportedNot supported
Infrared portSupportedSupported

🧭 Sensors

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
SensorsAccelerometer
Ambient light sensor
Compass
Fingerprint sensor
Gyroscope
Hall effect
Proximity sensor
Accelerometer
Ambient light sensor
Compass
Face unlock 2D
Fingerprint sensor (side-mounted)
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Battery typeLi-Ion: lithium-ion (Non removable)LiPo: li-ion polymer (Non removable)
Battery capacity4600 mAh5020 mAh
Charger, watts18W (9V/2A) Wired fast charging18W Wired fast charging
Inductive / wireless chargingfeature not registeredNot supported
Talk time autonomy34 hours (1.4 days)feature not registered
Standbyfeature not registeredfeature not registered

➕ Other features

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Titanium Gray, Glacier Silver, Rose Gold
• USB OTG On-The-Go
• Asus ZenUI 3.0
• Sony IMX318 sensor camera
• DTS headphone
• Hi-Res audio 192kHz/24bit
• Quick Charge 3.0
• Fast charging battery: 60% in 45min
• Miracast
• Colors: Aurora Blue, Glacier White, Interstellar Black

☢️ Radiation rate

Asus Zenfone 3 Ultra (ZU680KL 32GB)Redmi Note 9S (128GB)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registered0.96W/kg (head), 0.4W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registered0.72W/kg (head), 0.98W/kg (body)
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