Comparison ASUS ZenFone 4 Pro ZS551KL 128GB and Apple iPhone X 256GB

Show: all features only different features	ASUS ZenFone 4 Pro ZS551KL 128GB	Apple iPhone X 256GB
General characteristics
Type	smartphone	smartphone
OS version	Android 7.0	iOS 11
Case type	classic	classic
Control	mechanical sensor keyboard	voice typing voice-activated control
SIM-card type	nano SIM	nano SIM
SIM-card amount	2 (100%)	1 (50%)
Multi SIM mode	alternate	—
Weight	175 grams (100%)	174 grams (99%)
Width	75.6 mm (100%)	70.9 mm (94%)
Height	156.9 mm (100%)	143.6 mm (92%)
Thickness	7.6 mm (99%)	7.7 mm (100%)
Case material	—	glass
Construction	—	waterproof
Display
Diagonal	5.5" (95%)	5.8" (100%)
Screen size	1920x1080	2436x1125
Number of pixels per inch (PPI)	401 (87%)	463 (100%)
Screen type	colored AMOLED sensor	colored OLED sensor
Sensor screen type	multitouch capacitive	multitouch capacitive
Aspect Ratio	16:9	19.5:9
Automatic display rotation
Force of pressing on the screen	—
Multimedia features
Rear camera	double 12 16 MP	double 12 12 MP
Flash	rear LED	rear LED
Rear camera functions	autofocus laser optical stabilization optical Zoom 2x	autofocus optical stabilization
Rear camera diaphragm	F 1.7	F 1.8
Video Recording
Video resolution max	3840x2160	3840x2160
Max. frame rate of video	30 fps	60 fps
Front camera	8 megapixels (100%)	7 megapixels (88%)
Audio	MP3 AAC WAV WMA FM-radio	MP3 AAC WAV stereo speakers
Headphone jack	3.5 mm	—
Geo Tagging	—
Connectivity
Standard	GSM 900/1800/1900 3G 4G LTE LTE-A Cat. 12	GSM 900/1800/1900 3G 4G LTE LTE-A VoLTE
Interfaces	Wi-Fi 802.11ac Wi-Fi Direct Bluetooth 5.0 USB NFC	Wi-Fi 802.11ac Bluetooth 5.0 NFC
Satellite navigation	GPS BeiDou	GPS
A-GPS system
LTE range support	—	model A1865: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66) TD-LTE (Bands 34, 38, 39, 40, 41); model A1901: FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66) TD-LTE (Bands 34, 38, 39, 40, 41)
Storage and processor
CPU	Qualcomm Snapdragon 835 MSM8998	Apple A11 Bionic
Processor cores number	8 (100%)	6 (75%)
Video processor	Adreno 540	—
Built-in memory	128 GB (50%)	256 GB (100%)
Amount of RAM	6 GB	—
Memory card slot	yes volume of up to 2048 GB SIM-card compatable	—
Power supply
Battery capacity	3600 mA⋅h	—
Battery	non-removable	non-removable
Connector type for charging	USB Type-C	Lightning
Battery type	—	Li-Ion
Talk time	—	21 hours
Time in music listening mode	—	60 hours
Wireless charging function	—
Quick charging function	—
Other functions
Control	mechanical sensor keyboard	voice typing voice-activated control
Airplane mode
Sensors	illumination sensor approaching sensor Hall sensor gyroscope compass fingerprint scanner	illumination sensor approaching sensor gyroscope compass barometer
Flashlight
Speakerphone (built-in speaker)	—