Screen size
Galaxy A576.7"
Galaxy S21 Ultra 5GWinner: 6.8"+1.5%
Quick verdict
Galaxy S21 Ultra 5G leads the measured specs 6-5.
Measured wins
Galaxy A57
5
spec wins
Ties
12
equal specs
Galaxy S21 Ultra 5G
6
spec wins
Overall winner
Screen size
Technology
Galaxy A57
GSM / HSPA / LTE / 5G
Galaxy S21 Ultra 5G
GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands
Galaxy A57
GSM 850 / 900 / 1800 / 1900
Galaxy S21 Ultra 5G
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900 & TD-SCDMA
3G bands
Galaxy A57
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Galaxy S21 Ultra 5G
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
4G bands
Galaxy A57
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
equal specsRAM
equal specsStorage
equal specsMain camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
equal specsWi‑Fi
equal specsBluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
equal specs1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 32, 38, 40, 41, 66
Galaxy S21 Ultra 5G
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1, 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - SM-G998B
5G bands
Galaxy A57
1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6
Galaxy S21 Ultra 5G
2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G998U1, 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 - SM-G998B
Speed
Galaxy A57
HSPA, LTE, 5G
Galaxy S21 Ultra 5G
HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
Announced
Galaxy A57
2026, March 25
Galaxy S21 Ultra 5G
2021, January 14
Status
Galaxy A57
Released Apr 10, 2026
Galaxy S21 Ultra 5G
Available. Released 2021, January 29
Dimensions
Galaxy A57
161.5 x 76.8 x 6.9 mm (6.36 x 3.02 x 0.27 in)
Galaxy S21 Ultra 5G
165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
Weight
Galaxy A57
179 g (6.31 oz)
Galaxy S21 Ultra 5G
227 g (Sub6), 229 g (mmWave) (8.01 oz)
Build
Galaxy A57
Glass front (Gorilla Glass Victus+), aluminum frame, glass back (Gorilla Glass Victus+)
Galaxy S21 Ultra 5G
Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame
SIM
Galaxy A57
· Nano-SIM + eSIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
Galaxy S21 Ultra 5G
· Nano-SIM + eSIM· Nano-SIM + Nano-SIM + eSIM (max 2 at a time)
Other
Galaxy A57
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Galaxy S21 Ultra 5G
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Stylus support
Type
Galaxy A57
Super AMOLED+, 120Hz, HDR10+, 1200 nits (HBM), 1900 nits (peak)
Galaxy S21 Ultra 5G
Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
Size
Galaxy A57
6.7 inches, 110.2 cm2 (~88.8% screen-to-body ratio)
Galaxy S21 Ultra 5G
6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
Resolution
Galaxy A57
1080 x 2340 pixels, 19.5:9 ratio (~385 ppi density)
Galaxy S21 Ultra 5G
1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
Protection
Galaxy A57
Corning Gorilla Glass Victus+, Mohs level 5
Galaxy S21 Ultra 5G
Corning Gorilla Glass Victus
OS
Galaxy A57
Android 16, up to 6 major Android upgrades, One UI 8.5
Galaxy S21 Ultra 5G
Android 11, up to 4 major Android upgrades, One UI 6.1
Chipset
Galaxy A57
Exynos 1680 (4 nm)
Galaxy S21 Ultra 5G
Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
CPU
Galaxy A57
Octa-core (1x2.9 GHz Cortex-720 & 4x2.6 GHz Cortex-720 & 3x1.95 GHz Cortex-520)
Galaxy S21 Ultra 5G
Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China
GPU
Galaxy A57
Xclipse 550
Galaxy S21 Ultra 5G
Mali-G78 MP14 - InternationalAdreno 660 - USA/China
Card slot
Galaxy A57
No
Galaxy S21 Ultra 5G
No
Internal
Galaxy A57
128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM
Galaxy S21 Ultra 5G
128GB 8GB RAM, 128GB 12GB RAM, 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM
Other
Galaxy A57
UFS
Galaxy S21 Ultra 5G
UFS 3.1
Triple
Galaxy A57
50 MP, f/1.8, (wide), 1/1.56", 1.0µm, PDAF, OIS 12 MP, f/2.2, 123˚ (ultrawide), 1/3.06", 1.12µm 5 MP, f/2.4, (macro)
Galaxy S21 Ultra 5G
-
Features
Galaxy A57
Best Face, LED flash, panorama, HDR
Galaxy S21 Ultra 5G
Laser AF, LED flash, auto-HDR, panorama
Video
Galaxy A57
4K@30fps, 1080p@30/60fps, HDR, gyro-EIS
Galaxy S21 Ultra 5G
8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
Quad
Galaxy A57
-
Galaxy S21 Ultra 5G
108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8µm, PDAF, OIS 10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video
Single
Galaxy A57
12 MP, f/2.2, (wide), 1/3.2", 1.12µm
Galaxy S21 Ultra 5G
40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF
Video
Galaxy A57
4K@30fps, 1080p@30/60fps, 10-bit HDR
Galaxy S21 Ultra 5G
4K@30/60fps, 1080p@30fps
Features
Galaxy A57
-
Galaxy S21 Ultra 5G
HDR
Loudspeaker
Galaxy A57
Yes, with stereo speakers
Galaxy S21 Ultra 5G
Yes, with stereo speakers
3.5mm jack
Galaxy A57
No
Galaxy S21 Ultra 5G
No
Other
Galaxy A57
-
Galaxy S21 Ultra 5G
High-bitrate audio support
WLAN
Galaxy A57
Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band or tri-band, Wi-Fi Direct
Galaxy S21 Ultra 5G
Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct
Bluetooth
Galaxy A57
6.0, A2DP, LE
Galaxy S21 Ultra 5G
5.2, A2DP, LE
Positioning
Galaxy A57
GPS, GALILEO, GLONASS, BDS, QZSS
Galaxy S21 Ultra 5G
GPS, GLONASS, BDS, GALILEO
NFC
Galaxy A57
Yes (market/region dependent)
Galaxy S21 Ultra 5G
Yes
Radio
Galaxy A57
No
Galaxy S21 Ultra 5G
FM radio (Snapdragon model only; market/operator dependent)
USB
Galaxy A57
USB Type-C 2.0, OTG
Galaxy S21 Ultra 5G
USB Type-C 3.2, OTG
Sensors
Galaxy A57
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Galaxy S21 Ultra 5G
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Other
Galaxy A57
-
Galaxy S21 Ultra 5G
Samsung DeX, Samsung Wireless DeX (desktop experience support) Ultra Wideband (UWB) support
Type
Galaxy A57
5000 mAh
Galaxy S21 Ultra 5G
Li-Ion 5000 mAh
Charging
Galaxy A57
45W wired
Galaxy S21 Ultra 5G
25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless
Colors
Galaxy A57
Navy, Gray, Icyblue, Lilac
Galaxy S21 Ultra 5G
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Models
Galaxy A57
SM-A576B, SM-A576B/DS, SM-A576Q, SM-A576U1, SM-A576W, SM-A576Z, SM-A5760
Galaxy S21 Ultra 5G
SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980
SAR
Galaxy A57
0.85 W/kg (head) 1.20 W/kg (body)
Galaxy S21 Ultra 5G
0.77 W/kg (head) 1.02 W/kg (body)
SAR EU
Galaxy A57
0.70 W/kg (head) 1.07 W/kg (body)
Galaxy S21 Ultra 5G
0.71 W/kg (head) 1.58 W/kg (body)
Price
Galaxy A57
₹ 56,999
Galaxy S21 Ultra 5G
$ 200.79 / C$ 407.99 / £ 207.95 / € 259.99