Screen size
Galaxy S25Winner: 6.2"+68%
Z5502.0"
Quick verdict
Galaxy S25 leads the measured specs 19-2.
Measured wins
Galaxy S25
19
spec wins
Overall winner
Ties
2
equal specs
Z550
2
spec wins
Screen size
Technology
Galaxy S25
GSM / CDMA / HSPA / EVDO / LTE / 5G
Z550
GSM / UMTS
2G bands
Galaxy S25
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900 & TD-SCDMA
Z550
GSM 900 / 1800 / 1900
3G bands
Galaxy S25
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
Z550
UMTS 2100
4G bands
Galaxy S25
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International, 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 48, 66, 71 - USA unlocked
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
3.5mm jack
equal specsSD card
Stereo speakers
equal specsZ550
-
5G bands
Galaxy S25
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International, 1, 2, 5, 7, 25, 28, 41, 66, 71, 77, 78, 257, 258, 260, 261 SA/NSA/Sub6/mmWave - USA unlocked
Z550
-
Speed
Galaxy S25
HSPA, LTE (up to 7CA), 5G
Z550
Yes, 384 kbps
Announced
Galaxy S25
2025, January 22
Z550
2006, March
Status
Galaxy S25
Available. Released 2025, February 03
Z550
Discontinued
Dimensions
Galaxy S25
146.9 x 70.5 x 7.2 mm (5.78 x 2.78 x 0.28 in)
Z550
93 x 45 x 17.5 mm (3.66 x 1.77 x 0.69 in)
Weight
Galaxy S25
162 g (5.71 oz)
Z550
95 g (3.35 oz)
Build
Galaxy S25
Glass front (Gorilla Glass Victus 2), glass back (Gorilla Glass Victus 2), aluminum frame
Z550
-
SIM
Galaxy S25
· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) - INT· Nano-SIM + eSIM + eSIM (max 2 at a time) - USA· Nano-SIM + Nano-SIM - CN
Z550
Mini-SIM
Other
Galaxy S25
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Armor aluminum 2 frame
Z550
-
Type
Galaxy S25
Dynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak)
Z550
TFT, 256K colors
Size
Galaxy S25
6.2 inches, 94.4 cm2 (~91.1% screen-to-body ratio)
Z550
2.0 inches, 30 x 40 mm, 12.4 cm2 (~29.6% screen-to-body ratio)
Resolution
Galaxy S25
1080 x 2340 pixels, 19.5:9 ratio (~416 ppi density)
Z550
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Protection
Galaxy S25
Corning Gorilla Glass Victus 2, Mohs level 5
Z550
-
OS
Galaxy S25
Android 15, up to 7 major Android upgrades, One UI 8
Z550
-
Chipset
Galaxy S25
Qualcomm SM8750-AC Snapdragon 8 Elite (3 nm)
Z550
-
CPU
Galaxy S25
Octa-core (2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
Z550
-
GPU
Galaxy S25
Adreno 830 (1200 MHz)
Z550
-
Card slot
Galaxy S25
No
Z550
microSD (dedicated slot)
Internal
Galaxy S25
128GB 12GB RAM, 256GB 12GB RAM, 512GB 12GB RAM
Z550
138MB
Other
Galaxy S25
UFS 4.0
Z550
-
Phonebook
Galaxy S25
-
Z550
Yes
Call records
Galaxy S25
-
Z550
20 dialed, 20 received, 20 missed calls
Triple
Galaxy S25
50 MP, f/1.8, 24mm (wide), 1/1.56", 1.0µm, dual pixel PDAF, OIS 10 MP, f/2.4, 67mm (telephoto), 1/3.94", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video
Z550
-
Features
Galaxy S25
Best Face, LED flash, auto-HDR, panorama
Z550
-
Video
Galaxy S25
8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS
Z550
Yes
Single
Galaxy S25
-
Z550
2 MP
Single
Galaxy S25
12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF
Z550
Videocall camera
Features
Galaxy S25
HDR, HDR10+
Z550
-
Video
Galaxy S25
4K@30/60fps, 1080p@30fps
Z550
Loudspeaker
Galaxy S25
Yes, with stereo speakers
Z550
Yes, with stereo speakers
3.5mm jack
Galaxy S25
No
Z550
No
Other
Galaxy S25
High-bitrate audio support
Z550
Dual speaker
Alert types
Galaxy S25
-
Z550
Vibration; Downloadable polyphonic, MP3 ringtones
WLAN
Galaxy S25
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Z550
No
Bluetooth
Galaxy S25
5.4, A2DP, LE
Z550
2.0, A2DP
Positioning
Galaxy S25
GPS, GLONASS, BDS, GALILEO, QZSS
Z550
No
NFC
Galaxy S25
Yes
Z550
-
Radio
Galaxy S25
No
Z550
No
USB
Galaxy S25
USB Type-C 3.2, DisplayPort 1.2, OTG
Z550
Proprietary
Sensors
Galaxy S25
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Z550
Other
Galaxy S25
Samsung DeX, Samsung Wireless DeX (desktop experience support)
Z550
Video telephony & streaming MP3/AAC/ACC+ player Predictive text input Document viewer (Word, Excel, PowerPoint, PDF) Organizer
Messaging
Galaxy S25
-
Z550
SMS, EMS, MMS, Email
Browser
Galaxy S25
-
Z550
WAP 2.0/xHTML
Games
Galaxy S25
-
Z550
Yes + downloadable
Java
Galaxy S25
-
Z550
Yes, MIDP 2.0
Type
Galaxy S25
Li-Ion 4000 mAh
Z550
Removable battery
Charging
Galaxy S25
25W wired, PD3.0, 50% in 30 min 15W wireless (Qi2 Ready) 4.5W reverse wireless
Z550
-
Colors
Galaxy S25
Icy Blue, Mint, Navy, Silver Shadow, Pink Gold, Coral Red, Blue Black
Z550
Models
Galaxy S25
SM-S931B, SM-S931B/DS, SM-S931U, SM-S931U1, SM-S931W, SM-S931N, SM-S9310, SM-S931E, SM-S931E/DS
Z550
-
SAR
Galaxy S25
1.13 W/kg (head) 0.92 W/kg (body)
Z550
-
SAR EU
Galaxy S25
1.29 W/kg (head) 1.36 W/kg (body)
Z550
-
Price
Galaxy S25
$ 799.99 / C$ 679.99 / £ 429.99 / € 589.90 / ₹ 74,999
Z550
-