Lenovo Vibe Z2 Pro (K920) vs Samsung Galaxy M55 (SM-M556B/DS 128GB)

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Side by side comparison between Lenovo Vibe Z2 Pro vs Samsung Galaxy M55 phones, differences, pros, cons and full specifications. What's the better?

5/19/2025 11:15 AM, updated: 5/20/2025 7:27 AM

Compare Samsung Galaxy M55 X Lenovo Vibe Z2 Pro (K920) 08Points

Specifications Compare Models Pictures

6"
IPS

1440x2560

16
MP

5mp

3GB
RAM

Quad-core

4000
mAh

(Non removable)

20Points Samsung Galaxy M55 (SM-M556B/DS 128GB) Compare Lenovo Vibe Z2 Pro X

Specifications Compare Models Pictures

6.7"
AMOLED

1080x2400

50
MP

50mp

8GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Samsung Galaxy M55 (SM-M556B/DS 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!

8 Advantages Lenovo Vibe Z2 Pro (K920)	vs	20 Advantages Samsung Galaxy M55 (SM-M556B/DS 128GB)
+179 grams (6.27 ounces)1% Lighter	vs	180 grams (6.3 ounces)
+7.7 millimeters (0.3 inches)1% Thinner	vs	7.8 millimeters (0.31 inches)
+1440x2560 pixels42% Higher resolution screen	vs	1080x2400 pixels
+490 PPI25% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	393 PPI
+Dual-LED flashAdvantage The Dual-LED flash helps in dark places or in low light	vs	LED flash
+3.5mm jackAdvantage Headsets with 3.5mm Jack size are more common and easy to find in stores	vs	Type-C reversible connector
+FMAdvantage The radio lets you listen to your songs and sports in general	vs	Not supported
+Gorilla Glass 3Advantage Protection against scratches on the screen lets you carry your phone with your keys	vs	Not supported
2.5GHz 32bit Quad-core	vs	+2.4GHz 64bit Octa-core (4nm)44% More powerful processor, you can open your applications faster
3GB LPDDR3	vs	+8GB LPDDR4X167% More RAM memory. Typically more responsive and better for multitasking.
32GB	vs	+128GB (105GB available)2 times More internal storage for applications and files
Not supported	vs	+Until 1TB microSD, microSDXCAdvantage More external storage for files using memory cards
TFT IPS LCD	vs	+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid
6"	vs	+6.7"12% Larger screen
(back) 16MP	vs	+(triple camera) 50MP + 8MP + 2MP3 times Higher resolution main camera
HDR photo only main camera	vs	+HDR photo on both camerasAdvantage The HDR technology produced photos with more detail in dark areas
(front) 5MP	vs	+(front) 50MP9 times Higher resolution secondary camera to take pictures and selfies
(front) Full HD (1920x1080)	vs	+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera
Android 4.4.2 KitKat	vs	+Android 15Advantage Android 15 is newer and safer
4G LTE-A	vs	+5G Sub6Advantage The 5G Sub6 network is newer and faster
(4G LTE-A) 150 Mbps	vs	+(5G Sub6) 3000 Mbps19 times Faster for surfing the internet and download files
Not supported	vs	+Face unlock 2DAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (under display)Advantage Sensors help you use the device
Not supported	vs	+GyroscopeAdvantage Sensors help you use the device
4000 mAh	vs	+5000 mAh25% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
802.11 a/b/g/n [wifi4]	vs	+802.11 a/b/g/n/ac/ax [wifi6]Advantage WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
4.0 + A2DP	vs	+5.2 + A2DP/LEAdvantage Bluetooth 5.2 + A2DP/LE is newer and faster
MicroUSB 2.0	vs	+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.

21 Common items in both devices

16 million

Only digital zoom

Autofocus / PDAF: phase detection autofocus

BSI sensor

4K UHD (3840x2160)

Capacitive

Multitouch

+14 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
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Change model		Choose the model
Model	Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Other model names	Phablet Lenovo K920 Vibe Z2 Pro LTE-A	Galaxy M55 5G SM-M556B/Dual-SIM
Country or region available	feature not registered	(Global, International), Bangladesh, Mexico
Brand	Lenovo	Samsung
Release date	9/1/2014	3/28/2024
Depth	7.7 millimeters (0.3 inches)	7.8 millimeters (0.31 inches)
Size (width x height)	81.3 x 156 millimeters (3.2 x 6.14 in)	76.5 x 163.9 millimeters (3.01 x 6.45 in)
Weight	179 grams (6.27 ounces)	180 grams (6.3 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	Not supported
📲 Display
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Display type	TFT IPS LCD	Super AMOLED
Screen size	6" inches	6.7" inches
Screen-to-body ratio	~78.3% (screen-to-body ratio)	~86.4% (screen-to-body ratio)
Display resolution	1440x2560 pixels	1080x2400 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	490 PPI	393 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 3	Not supported
Refresh rate	feature not registered	120Hz
Display features	feature not registered	Always-On Display
🤖 Operating System
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
System version	Android 4.4.2 KitKat	Android 14
Firmware update	feature not registered	Android 15
User Interface	feature not registered	One UI 6.1 / 7.0
⚙️ Processor
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Chipset	32bit: Qualcomm Snapdragon 801 MSM8974-AC (28nm)	64bit: Qualcomm Snapdragon 7 Gen 1 (SM7450-AB) (4nm)
CPU	Quad-core, 1 processor: 4x 2.5GHz Krait 400 (Quad-core)	Octa-core, 3 processors: 1x 2.4GHz ARM Cortex-A710 (Single-core) 3x 2.36GHz ARM Cortex-A710 (Triple-core) 4x 1.8GHz ARM Cortex-A510 (Quad-core)
GPU graphical controller	Qualcomm Adreno 330 578Mhz	Qualcomm Adreno 644 (443MHz)
Performance (benchmark)	feature not registered	AnTuTu: 582102 (v10)
💽 Memory and storage
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
RAM memory	3GB LPDDR3	8GB LPDDR4X
Internal storage	32GB	128GB (105GB available) UFS 2.2
External storage	Not supported	Until 1TB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)
📶 Mobile networks
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 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) micro-SIM (3FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	150/50 Mbps	3000/1024 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G, 5G
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	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1700/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE 800/850/900/1800/2100/2600	LTE Cat18 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE
Primary 5G network	Not supported	SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78)
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
Secondary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Secondary 3G network	Not supported	UMTS 850/900/1700/1900/2100
Secondary 4G network	Not supported	LTE Cat18 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 66) TD-LTE (38, 40, 41) VoLTE
Secondary data network	GPRS, EDGE	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6
📷 Camera
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Back camera (main camera)	16 megapixels	(triple camera) 50 megapixels 8MP ultrawide f/2.2123° 2MP macro f/2.4
Main camera resolution	4608x3456 pixels	8160x6120 pixels
Video recording (primary)	4K UHD (3840x2160) 30 fps	4K UHD (3840x2160) 30 fps
Flash	Dual-LED flash	LED flash
Focal aperture	feature not registered	f/1.8 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/1.56" inches
Pixel size	feature not registered	1µm pixel
Autofocus	Autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	feature not registered	OIS: Optical stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Supported
HDR	HDR photo only main camera	HDR photo on both cameras
Camera extras	feature not registered	4K@30fps 1080p@30/60fps 720p@240fps (slow motion)
📸 Front camera
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Front camera (secondary)	5 megapixels	50 megapixels
Front camera resolution	2592x1944 pixels	8160x6120 pixels
Video recording (secondary)	Full HD (1920x1080)	4K UHD (3840x2160)
Front flash	Not supported	Not supported
Focal aperture	feature not registered	f/2.4 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Loudspeaker	Supported	Stereo sound
Active noise cancellation	2 microphones or more	2 microphones
Radio	FM	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
USB	MicroUSB 2.0	USB 2.0 Type-C, USB OTG On-The-Go
Audio output	3.5mm jack	Type-C reversible connector
TV output	Not supported	USB Type-C (reversible)
Bluetooth	4.0 + A2DP	5.2 + A2DP/LE
WiFi	802.11 a/b/g/n [wifi4] (2.4GHz, 5GHz)	802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging, GLONASS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Sensors	Accelerometer Ambient light sensor Compass Proximity sensor	Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Battery type	LiPo: li-ion polymer (Non removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	4000 mAh	5000 mAh
Charger, watts	Wired charging	45W Wired fast charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	45 hours (1.9 days)	feature not registered
Standby	940 hours (39.2 days)	feature not registered
➕ Other features
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
Call control	Voice dialing, Voice recorder	Voice dialing, Voice recorder, Voice commands
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: Black, White, Gold • WiFi hotspot • Java framework	• Colors: Dark Blue, Light Green
☢️ Radiation rate
	Lenovo Vibe Z2 Pro (K920)	Galaxy M55 (SM-M556B/DS 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	0.79W/kg (head), 1.09W/kg (body)
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.96W/kg (head), 0.98W/kg (body)