Name: ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Brand: ASUS
SKU: zenfone-4-pro-dual-sim-td-lte-am-zs551kl-64gb
Availability: InStock
Rating: 5 (1 reviews)

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Brand
Asus	Asus
Model
ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Released
2015 Mar	2017 Sep
Hardware Designer
ASUSTeK Computer	ASUSTeK Computer
Manufacturer
ASUSTeK Computer	ASUSTeK Computer
OEM ID
Z008DC	Z01GD
Device Category
Smartphone	Smartphone
List of Additional Features
Asus ZenUI	Asus ZenUI 4.0, Asus TriTech+ technology, 4-axis OIS, 8 directions, OIS compensation, 4-axis OIS, 3-axis EIS, 6 directions EIS compensation, ASUS BoostMaster fast charging, Asus SonicMaster 4.0, DTS Headphone:X sound, ASUS Splendid technology

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Width
77.2 mm 3.04 inch	75.6 mm 2.98 inch
Height
152.5 mm 6 inch	156.9 mm 6.18 inch
Depth
10.9 mm 0.43 inches	7.6 mm 0.3 inches
Bounding Volume
128.3 ccm	90.1 ccm
Mass
170 g 6 ounces	175 g 6.17 ounces

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Platform
Google Android	Google Android
Operating System
Google Android 5.0.2 (Lollipop) Chinese	N/A
Operating System Kernel Version
3.10.20	N/A

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
CPU Clock
1833 MHz	2450 MHz
CPU
Intel Atom Z3560 (Moorefield) 2,014 64 bit quad-core 32 Kbyte I-Cache 24 Kbyte D-Cache 2048 Kbyte L2 22 nm IMG PowerVR G6430 GPU	Qualcomm Snapdragon 835 MSM8998 2,017 64 bit octa-core 32 Kbyte I-Cache 32 Kbyte D-Cache 2048 Kbyte L2 10 nm Qualcomm Adreno 540 GPU
RAM Type
mobile (LP) DDR3 SDRAM 800 MHz	LPDDR4x SDRAM 1866 MHz
RAM Capacity
2048 MiB RAM	6144 MiB RAM
Non-volatile Memory Type
Flash EEPROM	Flash EEPROM
Non-volatile Memory Interface
Yes	Yes
Non-volatile Memory Capacity
15259 MiB non-volatile 11500 MiB free user storage	N/A

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Display Diagonal
139.7 mm 5.5 inch	139 mm 5.5 inch
Resolution
720x1280 921600 pixels	1080x1920 2073600 pixels
Display Width
68.49 mm 2.7 inch	68.15 mm 2.68 inch
Display Height
121.76 mm 4.79 inch	121.15 mm 4.77 inch
Horizontal Full Bezel Width
8.71 mm	7.45 mm
Display Area
8339.2 square millimeter	8255.9 square millimeter
Display Area Utilization
70.8%	69.6%
Pixel Size
0.09512 mm/pixel	0.0631 mm/pixel
Pixel Density
267 PPI	403 PPI
Display Type
Color IPS TFT LCD display	Color AM-OLED display
Display Color Depth
24 bit/pixel	24 bit/pixel
Number of Display Scales
16.8M	16.8M
Display Illumination
LED	Self-illuminating
Display Light Reflection Mode
Yes	Yes
Display Subpixel Scheme
RGB Matrix (3 subpixels)	Yes
Scratch Resistant Screen
Corning Gorilla Glass 3	Corning Gorilla Glass 3
Graphical Controller
PowerVR G6430MP4	Qualcomm Adreno 540
A/V Out
No	No

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Audio Channel(s)
stereo	8
Microphone(s)
stereo	3
Loudspeaker(s):
mono	stereo
Audio Output:
3.5mm	3.5mm

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Supported Cellular Bands
GSM 850MHz (B5) GSM 900MHz (B8) GSM 1800MHz (B3) GSM 1900MHz (PCS, B2) UMTS 2100MHz (Band I, IMT) UMTS 1900MHz (Band II, PCS) UMTS 850MHz (Band V, CLR) UMTS 900MHz (Band VIII) TD-SCDMA 2000 MHz (B34) TD-SCDMA 1900 MHz (B39) LTE 2100 MHz (Band 1) LTE 1800 MHz (Band 3) TD-LTE 2600 MHz (Band 38) TD-LTE 1900 MHz (Band 39) TD-LTE 2300 MHz (Band XL) TD-LTE 2500 MHz (Band XLI) bands	GSM 850MHz (B5) GSM 900MHz (B8) GSM 1800MHz (B3) GSM 1900MHz (PCS, B2) UMTS 2100MHz (Band I, IMT) UMTS 1900MHz (Band II, PCS) UMTS 1800MHz (Band III) UMTS 1700/2100MHz (Band IV, AWS) UMTS 850MHz (Band V, CLR) UMTS 800MHz (Band VI) UMTS 900MHz (Band VIII) UMTS 800MHz (Band XIX) LTE 2100 MHz (Band 1) LTE 1900 MHz (Band 2, PCS) LTE 1800 MHz (Band 3) LTE 1700/2100 MHz (Band 4, AWS) LTE 850 MHz (Band 5) LTE 2600 MHz (Band 7) LTE 900 MHz (Band 8) LTE 700 MHz (Band 12) LTE 700 MHz (Band 17) LTE 800 MHz (Band 18) LTE 800 MHz (Band 19) LTE 800 MHz (Band 20) LTE 850 MHz (Band 26) LTE 700 MHz (Band 28) LTE 700 MHz (Band 29) LTE 2300 MHz (Band 30) TD-LTE 2600 MHz (Band 38) TD-LTE 1900 MHz (Band 39) TD-LTE 2500 MHz (Band XLI) bands
Supported Cellular Data Links
GPRS (Class unspecified) GPRS Class 12 EDGE (Class unspecified) UMTS 384 kbps (W-CDMA) HSUPA (Cat. unspecified) HSUPA 5.76 Mbps (Cat. 6) HSDPA (Cat. unspecified) HSPA+ 21.1 Mbps (Cat. 18) HSPA+ 42.2 Mbps (Cat. 20) TD-SCDMA TD-HSDPA LTE (Cat. unspecified) LTE 150 Mbps / 50 Mbps (Cat. 4) data links	GPRS (Class unspecified) EDGE (Class unspecified) UMTS 384 kbps (W-CDMA) HSUPA (Cat. unspecified) HSUPA 5.76 Mbps (Cat. 6) HSDPA (Cat. unspecified) HSPA+ 21.1 Mbps (Cat. 18) DC-HSDPA 42.2 Mbps (Cat. 24) LTE (Cat. unspecified) LTE 100 Mbps / 50 Mbps (Cat. 3) LTE 150 Mbps / 50 Mbps (Cat. 4) LTE 300 Mbps / 50 Mbps (Cat. 6) LTE 300 Mbps / 75 Mbps (Cat. 5) LTE 300 Mbps / 100 Mbps (Cat. 7) LTE 400 Mbps / 150 Mbps (LTE Cat. 13) LTE 450 Mbps / 50 Mbps (LTE Cat. 9) LTE 450 Mbps / 100 Mbps (LTE Cat. 10) LTE 600 Mbps / 50 Mbps (LTE Cat. 11) LTE 600 Mbps / 100 Mbps (LTE Cat. 12) data links
SIM Card Slot
Micro-SIM (3FF)	Nano-SIM (4FF)
Cellular Antenna
Internal antenna	Internal antenna
Call Alert Sound
64-chord melody	64-chord melody
Complementary Phone Services
Voice transmission Voice speaker Vibrating Alert Speakerphone ANC	Voice transmission Voice speaker Vibrating Alert Speakerphone ANC HD Voice Voice over LTE (VoLTE)
Cellular Controller
Intel XMM7262	Qualcomm MSM8998
Dual Cellular Network Operation
Dual standby / dual active	Dual standby
Sec. Supported Cellular Networks:
GSM 850MHz (B5) GSM 900MHz (B8) GSM 1800MHz (B3) GSM 1900MHz (PCS, B2)	GSM 850MHz (B5) GSM 900MHz (B8) GSM 1800MHz (B3) GSM 1900MHz (PCS, B2) UMTS 2100MHz (Band I, IMT) UMTS 1900MHz (Band II, PCS) UMTS 1800MHz (Band III) UMTS 1700/2100MHz (Band IV, AWS) UMTS 850MHz (Band V, CLR) UMTS 800MHz (Band VI) UMTS 900MHz (Band VIII) UMTS 800MHz (Band XIX) LTE 2100 MHz (Band 1) LTE 1900 MHz (Band 2, PCS) LTE 1800 MHz (Band 3) LTE 1700/2100 MHz (Band 4, AWS) LTE 850 MHz (Band 5) LTE 2600 MHz (Band 7) LTE 900 MHz (Band 8) LTE 700 MHz (Band 12) LTE 700 MHz (Band 17) LTE 800 MHz (Band 18) LTE 800 MHz (Band 19) LTE 800 MHz (Band 20) LTE 850 MHz (Band 26) LTE 700 MHz (Band 28) LTE 700 MHz (Band 29) LTE 2300 MHz (Band 30) TD-LTE 2600 MHz (Band 38) TD-LTE 1900 MHz (Band 39) TD-LTE 2500 MHz (Band XLI)
Sec. Supported Cellular Data Links:
GPRS (Class unspecified) EDGE (Class unspecified)	GPRS (Class unspecified) EDGE (Class unspecified) UMTS 384 kbps (W-CDMA) HSUPA (Cat. unspecified) HSUPA 5.76 Mbps (Cat. 6) HSDPA (Cat. unspecified) HSPA+ 21.1 Mbps (Cat. 18) DC-HSDPA 42.2 Mbps (Cat. 24) LTE 100 Mbps / 50 Mbps (Cat. 3) LTE 150 Mbps / 50 Mbps (Cat. 4) LTE 300 Mbps / 50 Mbps (Cat. 6) LTE 300 Mbps / 100 Mbps (Cat. 7) LTE 450 Mbps / 50 Mbps (LTE Cat. 9) LTE 450 Mbps / 100 Mbps (LTE Cat. 10) LTE 600 Mbps / 50 Mbps (LTE Cat. 11) LTE 600 Mbps / 100 Mbps (LTE Cat. 12)
Sec. SIM Card Slot
Micro-SIM (3FF) Internal antenna	Nano-SIM (4FF) Internal antenna
Sec. Phone Controller IC:
Intel XMM7262	N/A

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Touchscreen Type
Capacitive multi-touch sensing screen	Capacitive multi-touch sensing screen
Touchscreen Simultaneous Touch Points
Yes	10-point

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Expansion Interfaces
TransFlash microSD microSDHC microSD Extended Capacity	TransFlash microSD microSDHC microSD Extended Capacity
USB
USB 2.0 USB Hi-Speed (480 Mbps)	Yes USB Hi-Speed (480 Mbps)
USB Services
USB charging USB Host USB On-The-Go 1.3 USB Power Delivery	USB charging USB fast charging USB Host USB On-The-Go 1.3 USB On-The-Go 2.0 USB Power Delivery
USB Connector
USB Series Micro-AB	USB Type-C reversible
Bluetooth
Bluetooth 4.0 Internal antenna	Bluetooth 5.0 Internal antenna
Bluetooth profiles
A2DP A2DP with aptX codec AVRCP	A2DP A2DP with aptX codec AVRCP DIP GAP GAVDP HFP HID HSP MAP OPP PAN SPP
Wireless LAN
IEEE 802.11a IEEE 802.11b IEEE 802.11g IEEE 802.11n IEEE 802.11ac Internal antenna	IEEE 802.11a IEEE 802.11b IEEE 802.11g IEEE 802.11n IEEE 802.11ac Internal antenna
Wireless Services
Wi-Fi Direct	Wi-Fi Direct

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
FM Radio Receiver
No	FM radio (76-108 MHz) with RDS, Proprietary headset as antenna

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Supported GPS protocol(s)
GPS (NMEA 0183)	GPS (NMEA 0183)
Satellite Antenna:
Internal antenna	Internal antenna
Complementary Satellite Services
Simultaneous GPS (S-GPS) Assisted GPS Geotagging QuickGPS	Simultaneous GPS (S-GPS) Assisted GPS Geotagging QuickGPS
Supported BeiDou system (BDS)
B1I BeiDou receiver	B1I BeiDou receiver

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Camera Placement
Rear	Rear
Camera Image Sensor
BSI CMOS	BSI CMOS
Camera Resolution
4096x3072 pixel	3928x2944 pixel
Number of effective pixels
12.6 MP camera	11.6 MP camera
Zoom
1.0 x optical zoom	2.0 x optical zoom, 5.0 x digital zoom
Focus
Contrast Detection Autofocus (CD AF)	Contrast Detection Autofocus (CD AF), Phase-Detection Autofocus (PD AF), Laser Autofocus
Recordable Image Formats
JPG	JPG, RAW
Video Recording
1920x1080 pixel 30 fps	3840x2160 pixel 30 fps
Recordable Video Formats
3GP 3G2 MPEG4 MJPG	3GP 3G2 MPEG4
Flash
dual LED	dual LED
Camera Extra Functions
Macro mode	Video Stabilizer (EIS), Optical Image Stabilization (OIS), HDR photo, HDR video, Red-eye effect reduction, Slow motion video, Burst mode, Touch focus, Macro mode, Panorama Photo, Face detection, Face tagging, Smile detection, Face retouch, Face retouch (video)
Aux. Camera Image Sensor
No	BSI CMOS
Aux. 2 Camera Image Sensor
No	No
Aux. 3 Camera Image Sensor
No	No
Aux. 4 Camera Image Sensor
No	No
Aux. 4 Camera Focus
No	No

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Secondary Camera Placement
Front	Front
Secondary Camera Sensor
BSI CMOS	CMOS
Secondary Camera Resolution
2560x1920 pixel	3264x2448 pixel
Secondary Camera Number of pixels
4.9 MP sec. cam	8.0 MP sec. cam
Secondary Recordable Image Formats
JPG	JPG, PNG
Secondary Video Recording
1280x720 pixel 30 fps	3840x2160 pixel 30 fps
Secondary Recordable Video Formats
3GP MPEG4	3GP 3G2 MPEG4
Sec. Aux. Cam. Image Sensor
No	No
Sec. Aux. 2 Cam. Image Sensor
No	No

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Built-in compass
Yes	Yes
Built-in accelerometer
Yes	Yes
Built-in gyroscope
Yes	Yes
Additional sensors
Hall sensor Light intensity sensor Proximity sensor	Fingerprint sensor Light intensity sensor Proximity sensor Step counter

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Protection from solid materials
Yes	Yes
Protection from liquids
Yes	Yes

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Battery
Lithium-ion polymer (LiPo) built-in 1-cell	Lithium-ion polymer (LiPo) built-in 1-cell
Nominal Cell Capacity (1st cell)
3000 mAh cell	3600 mAh cell
Nominal Battery Capacity
3000 mAh battery	3600 mAh battery

ZenFone 2 Dual SIM TD-LTE ZE550ML	ZenFone 4 Pro Dual SIM TD-LTE AM ZS551KL 64GB
Market Countries
China	Brazil, Canada, Colombia, USA
Market Regions
Asia	North America (NA)
Mobile Operator
China Mobile Limited	N/A

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