Xiaomi Redmi K20 (64GB) vs Asus Zenfone 3 Ultra (ZU680KL 128GB)

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Side by side comparison between Xiaomi Redmi K20 vs Asus Zenfone 3 Ultra phones, differences, pros, cons and full specifications. What's the better?

7/29/2019 8:22 PM, updated: 6/24/2020 10:54 PM

Compare Asus Zenfone 3 Ultra X Xiaomi Redmi K20 (64GB) 16Points

Specifications Compare Models Pictures

6.39"
AMOLED

1080x2340

48
MP

20mp

6GB
RAM

Octa-core

4000
mAh

(Non removable)

06Points Asus Zenfone 3 Ultra (ZU680KL 128GB) Compare Xiaomi Redmi K20 X

Specifications Compare Models Pictures

6.8"
IPS+

1080x1920

23
MP

8mp

4GB
RAM

Octa-core

4600
mAh

(Non removable)

What's the better phone? Xiaomi Redmi K20 (64GB)

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!

16 Advantages Xiaomi Redmi K20 (64GB)	vs	6 Advantages Asus Zenfone 3 Ultra (ZU680KL 128GB)
+2.2GHz 64bit Octa-core (8nm)38% More powerful processor, you can open your applications faster	vs	1.8GHz 64bit Octa-core
+6GB LPDDR4X50% More RAM memory. Typically more responsive and better for multitasking.	vs	4GB LPDDR4
+191 grams (6.69 ounces)22% Lighter	vs	233 grams (8.16 ounces)
+AMOLEDAdvantage AMOLED display is brighter and more vivid	vs	TFT Super IPS+
+1080x2340 pixels22% Higher resolution screen	vs	1080x1920 pixels
+403 PPI24% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	324 PPI
+(triple camera) 48MP + 8MP + 13MP2 times Higher resolution main camera	vs	(back) 23MP
+Digital and optical zoomAdvantage The zoom allows for better focus and approach to take pictures	vs	Only digital zoom
+1/2" inches30% The larger sensor camera lets you take photos with better depth.	vs	1/2.6" inches
+f/1.8 (aperture)11% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.	vs	f/2.0 (aperture)
+(front) 20MP149% Higher resolution secondary camera to take pictures and selfies	vs	(front) 8MP
+Android 10Advantage Android 10 is newer and safer	vs	Android 8.0 Oreo
+(4G LTE-A) 800 Mbps167% Faster for surfing the internet and download files	vs	(4G LTE-A) 300 Mbps
+Face unlock 2DAdvantage Sensors help you use the device	vs	Not supported
+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster	vs	4.2 + A2DP
+NFCAdvantage NFC allows you to make payments by approach quickly and securely	vs	Not supported
64GB (49GB available)	vs	+128GB (118GB available)141% More internal storage for applications and files
Not supported	vs	+Until 256GB microSD, microSDXCAdvantage More external storage for files using memory cards
8.8 millimeters (0.35 inches)	vs	+6.8 millimeters (0.27 inches)29% Thinner
6.39"	vs	+6.8"6% Larger screen
EIS: Digital stabilization	vs	+OIS (4-axis): Optical stabilizationAdvantage Image stabilization prevents blurry photos and helps in recording motion video
4000 mAh	vs	+4600 mAh15% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use

29 Common items in both devices

16 million

Dual-LED flash

PDAF: phase detection autofocus / LDAF/PDAF: laser/phase detection autofocus

HDR photo on both cameras

4K UHD (3840x2160)

(front) Full HD (1920x1080)

4G LTE-A

+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

📱 Model features
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Change model		Choose the model
Model	Redmi K20 (64GB)	Zenfone 3 Ultra (ZU680KL 128GB)
Other model names	Xiaomi Redmi K20 M1903F10A, M1903F10C, MZB7754IN, MZB7755IN	Asus Zenfone 3 Ultra 4GB/128GB ZU680KL DualSim, Asus Mercury
Country or region available	China, India	(Global, International)
Brand	Xiaomi	Asus
Release date	6/1/2019	8/1/2016
Depth	8.8 millimeters (0.35 inches)	6.8 millimeters (0.27 inches)
Size (width x height)	74.3 x 156.7 millimeters (2.93 x 6.17 in)	93.9 x 186.4 millimeters (3.7 x 7.34 in)
Weight	191 grams (6.69 ounces)	233 grams (8.16 ounces)
Build, materials	Aluminum frame, glass front/back	feature not registered
Protection against water and others	Not supported	Not supported
📲 Display
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Display type	AMOLED	TFT Super IPS+
Screen size	6.39" inches	6.8" inches
Screen-to-body ratio	~86.1% (screen-to-body ratio)	~72.8% (screen-to-body ratio)
Display resolution	1080x2340 pixels (19.5:9)	1080x1920 pixels
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	403 PPI	324 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 5	Gorilla Glass 4
Refresh rate	60Hz	feature not registered
Display features	600nits[typ] HDR10	feature not registered
🤖 Operating System
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
System version	Android 9.0 Pie	Android 6.0.1 Marshmallow
Firmware update	Android 10	Android 8.0 Oreo
User Interface	feature not registered	feature not registered
⚙️ Processor
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Chipset	64bit: Qualcomm Snapdragon 730 (SM7150-AA) (8nm)	64bit: Qualcomm Snapdragon 652 MSM8976 (28nm)
CPU	Octa-core, 2 processors: 2x 2.2GHz Kryo 470 Gold (Dual-core) 6x 1.8GHz Kryo 470 Silver (Hexa-core)	Octa-core, 2 processors: 4x 1.8GHz ARM Cortex-A72 (Quad-core) 4x 1.4GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	Qualcomm Adreno 618 (610MHz)	Qualcomm Adreno 510 600Mhz
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
RAM memory	6GB LPDDR4X	4GB LPDDR4
Internal storage	64GB (49GB available) UFS 2.1	128GB (118GB available)
External storage	Not supported	Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)
📶 Mobile networks
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Dual-SIM	Dual-SIM Standby - Call active on one sim card	Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot)
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) micro-SIM (3FF) and nano-SIM (4FF)
Maximum Download / Upload	800/150 Mbps	300/50 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	CDMA 800 (China), GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	MZB7754IN, MZB7755IN, MZB7756IN version: UMTS 850/900/1900/2100 M1903F10A, M1903F10C, M1903F10T version: CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1900/2100	Global version: UMTS 800/850/900/1900/2100 China version: CDMA2000, TD-SCDMA 1900/2000 UMTS 800/850/900/1900/2100
Primary 4G network	LTE Cat15/13 VoLTE MZB7754IN, MZB7755IN, MZB7756IN version: LTE (Bands 1, 3, 5, 7, 8) TD-LTE (Bands 38, 40, 41) M1903F10A, M1903F10C, M1903F10T version: LTE (Bands 1, 3, 5, 7, 8) TD-LTE (Bands 34, 38, 39, 40, 41)	LTE 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)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	GPRS, EDGE	GPRS, EDGE
📷 Camera
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Back camera (main camera)	(triple camera) 48 megapixels 8MP telephoto f/2.453mm1/4"1.12µmPDAF2x-optical-zoom 13MP ultrawide f/2.412mm1/3"1.12µm	23 megapixels
Main camera resolution	8000x6000 pixels	5520x4140 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	4K UHD (3840x2160) 24 fps
Flash	Dual-LED flash	Dual-LED flash
Focal aperture	f/1.8 (aperture)	f/2.0 (aperture)
Focal length	26mm (lens)	feature not registered
Sensor size	1/2" inches	1/2.6" inches
Pixel size	0.8µm pixel	1.12µm pixel
Autofocus	PDAF: phase detection autofocus	LDAF/PDAF: laser/phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	EIS: Digital stabilization	OIS (4-axis): Optical stabilization
Zoom	Digital and optical zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Not supported
HDR	HDR photo on both cameras	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Front camera (secondary)	20 megapixels *Motorized pop-up camera (slider)	8 megapixels
Front camera resolution	5184x3840 pixels	3264x2448 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	Not supported
Focal aperture	f/2.2 (aperture)	f/2.0 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	0.8µm pixel	feature not registered
🔉 Sound and multimedia
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Loudspeaker	Supported	Supported
Active noise cancellation	2 microphones or more	2 microphones or more
Radio	FM	FM (RDS)
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD	MP4, H.264, H.263
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, eAAC+, FLAC
🔌 Connectivity
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
USB	USB 2.0 Type-C, USB OTG On-The-Go	USB 2.0 Type-C reversible connector
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	USB Type-C SlimPort®
Bluetooth	5.0 + A2DP/LE	4.2 + A2DP
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS, BeiDou
NFC	Supported	Not supported
Infrared port	Not supported	Supported
🧭 Sensors
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Sensors	Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Proximity sensor	Accelerometer Ambient light sensor Compass Fingerprint sensor Gyroscope Hall effect Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Battery type	LiPo: li-ion polymer (Non removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	4000 mAh	4600 mAh
Charger, watts	18W (9V/2A) Wired fast charging	18W (9V/2A) Wired fast charging
Inductive / wireless charging	feature not registered	feature not registered
Talk time autonomy	feature not registered	34 hours (1.4 days)
Standby	feature not registered	feature not registered
➕ Other features
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Carbon black, Flame red, Glacier blue • MIUI 10 • HDR display • 24-bit/192kHz audio • Quick Charge 4+	• 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
☢️ Radiation rate
	Redmi K20 (64GB)	Asus Zenfone 3 Ultra (ZU680KL 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)	1.07W/kg (head), 0.72W/kg (body)	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	feature not registered