Samsung Galaxy A40 (SM-A405FN/DS) vs Samsung Galaxy M55 (SM-M556E/DS 256GB/8GB)

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Side by side comparison between Samsung Galaxy A40 vs Samsung Galaxy M55 phones, differences, pros, cons and full specifications. What's the better?

5/19/2025 11:07 AM, updated: 5/20/2025 7:27 AM

Compare Samsung Galaxy M55 X Samsung Galaxy A40 (SM-A405FN/DS) 08Points

Specifications Compare Models Pictures

5.9"
AMOLED

1080x2340

16
MP

25mp

4GB
RAM

Octa-core

3100
mAh

(Non removable)

20Points Samsung Galaxy M55 (SM-M556E/DS 256GB/8GB) Compare Samsung Galaxy A40 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-M556E/DS 256GB/8GB)

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 Samsung Galaxy A40 (SM-A405FN/DS)	vs	20 Advantages Samsung Galaxy M55 (SM-M556E/DS 256GB/8GB)
+140 grams (4.9 ounces)29% Lighter	vs	180 grams (6.3 ounces)
+437 PPI11% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	393 PPI
+f/1.7 (aperture)6% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.	vs	f/1.8 (aperture)
+ANT+Advantage Sensors help you use the device	vs	Not supported
+2 slots (Dual-SIM) (dedicated slot)Advantage You can have more mobile carriers/operators on the same device.	vs	2 slots (Dual-SIM) (hybrid slot/shares the same microSD slot)
+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
+USB 3.1 Type-C, USB OTG On-The-GoAdvantage Newer and faster USB version for transferring photos, mp3 or data.	vs	USB 2.0 Type-C, USB OTG On-The-Go
1.8GHz 64bit Octa-core	vs	+2.4GHz 64bit Octa-core (4nm)58% More powerful processor, you can open your applications faster
4GB LPDDR4X	vs	+8GB LPDDR4X100% More RAM memory. Typically more responsive and better for multitasking.
64GB (49GB available)	vs	+256GB (233GB available)4 times More internal storage for applications and files
eMMC 5.1	vs	+UFS 2.2Advantage Fastest write and read storage.
7.9 millimeters (0.31 inches)	vs	+7.8 millimeters (0.31 inches)1% Thinner
1080x2340 pixels	vs	+1080x2400 pixels3% Higher resolution screen
5.9"	vs	+6.7"14% Larger screen
(dual camera) 16MP + 5MP	vs	+(triple camera) 50MP + 8MP + 2MP186% Higher resolution main camera
EIS: Digital stabilization	vs	+OIS: Optical stabilizationAdvantage Image stabilization prevents blurry photos and helps in recording motion video
Not supported	vs	+BSI sensorAdvantage The BSI sensor allows the entry of more light generating photos with more detail and brightness
(front) 25MP	vs	+(front) 50MP101% Higher resolution secondary camera to take pictures and selfies
Full HD (1920x1080)	vs	+4K UHD (3840x2160)3 times More image quality for recording videos with the primary camera
(front) Full HD (1920x1080)	vs	+(front) 4K UHD (3840x2160)3 times More image quality for recording videos with the secondary camera
Android 9.0 Pie	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) 600 Mbps	vs	+(5G Sub6) 3000 Mbps4 times Faster for surfing the internet and download files
3100 mAh	vs	+5000 mAh61% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
15W	vs	+45W2 times More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
802.11 a/b/g/n/ac [wifi5]	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
5.0 + A2DP/LE	vs	+5.2 + A2DP/LEAdvantage Bluetooth 5.2 + A2DP/LE is newer and faster

25 Common items in both devices

Until 1TB microSD, microSDXC

Plastic body, glass front

Super AMOLED

16 million

LED flash

Only digital zoom

PDAF: phase detection autofocus

+18 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
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Change model		Choose the model
Model	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Other model names	Galaxy A40 SM-A405FN/Dual-Sim	Galaxy M55 5G SM-M556E/Dual-SIM
Country or region available	(Europe), (Global, International)	(Europe), Russia
Brand	Samsung	Samsung
Release date	4/10/2019	3/28/2024
Depth	7.9 millimeters (0.31 inches)	7.8 millimeters (0.31 inches)
Size (width x height)	69.2 x 144.4 millimeters (2.72 x 5.69 in)	76.5 x 163.9 millimeters (3.01 x 6.45 in)
Weight	140 grams (4.9 ounces)	180 grams (6.3 ounces)
Build, materials	Plastic body, glass front	Plastic body, glass front
Protection against water and others	Not supported	Not supported
📲 Display
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Display type	Super AMOLED	Super AMOLED
Screen size	5.9" inches	6.7" inches
Screen-to-body ratio	~85.5% (screen-to-body ratio)	~86.4% (screen-to-body ratio)
Display resolution	1080x2340 pixels	1080x2400 pixels (20:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch 10-points
Pixel density (dot pitch)	437 PPI	393 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Not supported
Refresh rate	feature not registered	120Hz
Display features	feature not registered	Always-On Display
🤖 Operating System
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
System version	Android 9.0 Pie	Android 14
Firmware update	feature not registered	Android 15
User Interface	feature not registered	One UI 6.1 / 7.0
⚙️ Processor
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Chipset	64bit: Samsung Exynos 7 Octa 7885 (14nm)	64bit: Qualcomm Snapdragon 7 Gen 1 (SM7450-AB) (4nm)
CPU	Octa-core, 2 processors: 2x 1.8GHz ARM Cortex-A73 (Dual-core) 6x 1.6GHz ARM Cortex-A53 (Hexa-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	ARM Mali-G71 MP2	Qualcomm Adreno 644 (443MHz)
Performance (benchmark)	feature not registered	AnTuTu: 582102 (v10)
💽 Memory and storage
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
RAM memory	4GB LPDDR4X	8GB LPDDR4X
Internal storage	64GB (49GB available) eMMC 5.1	256GB (233GB available) UFS 2.2
External storage	Until 1TB microSD, microSDXC (dedicated slot)	Until 1TB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)
📶 Mobile networks
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Dual-SIM	Dual-SIM Standby - Call active on one sim card (dedicated slot)	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) nano-SIM (4FF)
Maximum Download / Upload	600/150 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 850/900/1900/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	LTE Cat12/13 (Bands 1, 3, 5, 7, 8, 20) TD-LTE (Bands 38, 40, 41)	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+, TD-LTE, 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
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Back camera (main camera)	(dual camera) 16 megapixels 5MP ultrawide f/2.213mmFF	(triple camera) 50 megapixels 8MP ultrawide f/2.2123° 2MP macro f/2.4
Main camera resolution	4608x3456 pixels	8160x6120 pixels
Video recording (primary)	Full HD (1920x1080) 30 fps	4K UHD (3840x2160) 30 fps
Flash	LED flash	LED flash
Focal aperture	f/1.7 (aperture)	f/1.8 (aperture)
Focal length	26mm (lens)	feature not registered
Sensor size	feature not registered	1/1.56" inches
Pixel size	feature not registered	1µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	EIS: Digital stabilization	OIS: Optical stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Supported
HDR	HDR photo on both cameras	HDR photo on both cameras
Camera extras	feature not registered	4K@30fps 1080p@30/60fps 720p@240fps (slow motion)
📸 Front camera
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Front camera (secondary)	25 megapixels	50 megapixels
Front camera resolution	5760x4320 pixels	8160x6120 pixels
Video recording (secondary)	Full HD (1920x1080)	4K UHD (3840x2160)
Front flash	Not supported	Not supported
Focal aperture	f/2.0 (aperture)	f/2.4 (aperture)
Focal length	25mm (lens)	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
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, WMV, MKV	MP4, H.265, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
USB	USB 3.1 Type-C, USB OTG On-The-Go	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	5.0 + A2DP/LE	5.2 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	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, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Sensors	Accelerometer Ambient light sensor ANT+ Compass Face unlock Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor	Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
Battery type	LiPo: li-ion polymer (Non removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	3100 mAh	5000 mAh
Charger, watts	15W Wired fast charging	45W Wired fast charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	18 hours	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
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, Blue, Coral • 19.5:9 display ratio FHD+ • One UI	• Colors: Dark Blue, Light Green
☢️ Radiation rate
	Galaxy A40 (SM-A405FN/DS)	Galaxy M55 (SM-M556E/DS 256GB/8GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	0.49W/kg (head), 1.34W/kg (body)	0.81W/kg (head), 1.18W/kg (body)