Asus
Asus Zenfone 3 Ultra ZU680KL671 views
Side-by-side comparison
Asus Zenfone 3 Ultra ZU680KL vs Xiaomi Redmi K40
Xiaomi
Xiaomi Redmi K40Wins 1 specs
Asus Zenfone 3 Ultra ZU680KL — quick specs
- NetworkLTE / HSPA / GSM
- Display6.8 inches · 1080×1920
- Camera23 MP
- Memory3 GB RAM
- Battery4600 mAh
- OSAndroid 6.1
Xiaomi Redmi K40 — quick specs
- Network5G / LTE
- Display—
- Camera—
- Memory256 GB
- BatteryNon-removable Li-Po
- OS—
● Full specification comparison
Spec
Asus Zenfone 3 Ultra ZU680KL
Xiaomi Redmi K40
NETWORK
Technology
GSM / HSPA / LTE
2G, 3G, 4G, 4G LTE, 5G
Technology
AGSM / HSPA / LTE
B2G, 3G, 4G, 4G LTE, 5G
2G bands
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
—
2G bands
AGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
B—
3G bands
HSDPA 850 / 900 / 1900 / 2100 / 800
—
3G bands
AHSDPA 850 / 900 / 1900 / 2100 / 800
B—
4G bands
LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500)
—
4G bands
ALTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500)
B—
Speed
HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps
—
Speed
AHSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps
B—
LAUNCH
Announced
2016, May
K40/Pro/Pro+: / Poco F3: / Mi 11i: / Mi 11X/Pro: / K40 Gaming: / Poco F3 GT: / K40S: / Poco F4:
Announced
A2016, May
BK40/Pro/Pro+: / Poco F3: / Mi 11i: / Mi 11X/Pro: / K40 Gaming: / Poco F3 GT: / K40S: / Poco F4:
Status
Available. Released 2016, August
Available. Released 2021
Status
AAvailable. Released 2016, August
BAvailable. Released 2021
BODY
Dimensions
186.4 x 93.9 x 6.8 mm (7.34 x 3.70 x 0.27 in)
—
Dimensions
A186.4 x 93.9 x 6.8 mm (7.34 x 3.70 x 0.27 in)
B—
Weight
233 g (8.22 oz)
—
Weight
A233 g (8.22 oz)
B—
SIM
Hybrid Dual SIM (Nano-SIM, dual stand-by)
—
SIM
AHybrid Dual SIM (Nano-SIM, dual stand-by)
B—
Build
—
Slate
Build
A—
BSlate
DISPLAY
Type
IPS LCD capacitive touchscreen, 16M colors
6.67 in AMOLED capacitive touchscreen, 1080p 1080 × 2400 pixels (2.5 MP), 20:9 aspect ratio (395ppi), 120Hz refresh rate, HDR10+
Type
AIPS LCD capacitive touchscreen, 16M colors
B6.67 in AMOLED capacitive touchscreen, 1080p 1080 × 2400 pixels (2.5 MP), 20:9 aspect ratio (395ppi), 120Hz refresh rate, HDR10+
Size
6.8 inches, 127.5 cm2 (~72.8% screen-to-body ratio)
—
Size
A6.8 inches, 127.5 cm2 (~72.8% screen-to-body ratio)
B—
Resolution
1080 x 1920 pixels, 16:9 ratio (~324 ppi density)
—
Resolution
A1080 x 1920 pixels, 16:9 ratio (~324 ppi density)
B—
Protection
Corning Gorilla Glass 4
—
Protection
ACorning Gorilla Glass 4
B—
PLATFORM
OS
Android 6.1 (Marshmallow); ZenUI 3
—
OS
AAndroid 6.1 (Marshmallow); ZenUI 3
B—
Chipset
Qualcomm MSM8976 Snapdragon 652 (28 nm)
—
Chipset
AQualcomm MSM8976 Snapdragon 652 (28 nm)
B—
CPU
Octa-core (4x1.8 GHz Cortex-A72 & 4x1.4 GHz Cortex-A53)
Octa-core
CPU
AOcta-core (4x1.8 GHz Cortex-A72 & 4x1.4 GHz Cortex-A53)
BOcta-core
GPU
Adreno 510
—
GPU
AAdreno 510
B—
MEMORY
Card slot
microSD, up to 256 GB (uses shared SIM slot)
None
Card slot
AmicroSD, up to 256 GB (uses shared SIM slot)
BNone
Internal
32GB 3GB RAM, 64GB 3GB RAM, 128GB 4GB RAM
128 or 256GB UFS 3.1
Internal
A32GB 3GB RAM, 64GB 3GB RAM, 128GB 4GB RAM
B128 or 256GB UFS 3.1
MAIN CAMERA
Single
23 MP, f/2.0, 1/2.6", 1.0µm, PDAF, Laser AF, 4-axis OIS"
—
Single
A23 MP, f/2.0, 1/2.6", 1.0µm, PDAF, Laser AF, 4-axis OIS"
B—
SELFIE CAMERA
Video
1080p@30fps
—
Video
A1080p@30fps
B—
Single
8 MP, f/2.0
20 MP, (f/2.2, 27mm, 1/3.4", 0.8 μm) / HDR, 1080p@30fps, 720p@120fps
Single
A8 MP, f/2.0
B20 MP, (f/2.2, 27mm, 1/3.4", 0.8 μm) / HDR, 1080p@30fps, 720p@120fps
SOUND
Loudspeaker
Yes, dual speakers
Stereo loudspeakers
Loudspeaker
AYes, dual speakers
BStereo loudspeakers
3.5mm jack
Yes
24-bit/192kHz audio
No
3.5mm jack
AYes
24-bit/192kHz audio
BNo
COMMS
WLAN
Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot
Wi-Fi 802.11a/b/g/n/6/6e (2.4 & 5GHz), dual-band, WiFi Direct, DLNA, hotspot Bluetooth V5.1/5.2, A2DP, Low-energy, aptX-HD, NFC, USB 2.0 Type-C, Infrared Blaster, GNSS (A-GPS, GLONASS, GALILEO, BDS, QZSS, NAVIC)
WLAN
AWi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot
BWi-Fi 802.11a/b/g/n/6/6e (2.4 & 5GHz), dual-band, WiFi Direct, DLNA, hotspot Bluetooth V5.1/5.2, A2DP, Low-energy, aptX-HD, NFC, USB 2.0 Type-C, Infrared Blaster, GNSS (A-GPS, GLONASS, GALILEO, BDS, QZSS, NAVIC)
Bluetooth
4.2, A2DP, EDR, LE
5.x, A2DP, LE
Bluetooth
A4.2, A2DP, EDR, LE
B5.x, A2DP, LE
GPS
Yes, with A-GPS, GLONASS, BDS
Yes, with A-GPS, GLONASS, BDS, GALILEO
GPS
AYes, with A-GPS, GLONASS, BDS
BYes, with A-GPS, GLONASS, BDS, GALILEO
USB
2.0, Type-C 1.0 reversible connector, USB On-The-Go
USB Type-C
USB
A2.0, Type-C 1.0 reversible connector, USB On-The-Go
BUSB Type-C
Radio
FM radio
—
Radio
AFM radio
B—
NFC
—
Yes
NFC
A—
BYes
FEATURES
Sensors
Fingerprint (front-mounted), accelerometer, gyro, proximity, compass
Fingerprint, accelerometer, gyro, proximity, compass, barometer
Sensors
AFingerprint (front-mounted), accelerometer, gyro, proximity, compass
BFingerprint, accelerometer, gyro, proximity, compass, barometer
BATTERY
Charging
Fast battery charging 18W: 60% in 45 min (Quick Charge 3.0)
Fast charging
Charging
AFast battery charging 18W: 60% in 45 min (Quick Charge 3.0)
BFast charging
Battery Type
Non-removable Li-Ion 4600 mAh battery
Non-removable Li-Po
Battery Type
ANon-removable Li-Ion 4600 mAh battery
BNon-removable Li-Po
MISC
Colors
Glacier Silver, Titanium Gray, Metallic Pink
—
Colors
AGlacier Silver, Titanium Gray, Metallic Pink
B—
Price
330 USD
—
Price
A330 USD
B—
Cells highlighted in green indicate a measurably better spec on that phone (battery capacity, RAM, storage, display size). Text-only specs are shown side by side without highlighting.