Screen size
Galaxy A21Winner: 6.5"+4.6%
Galaxy S256.2"
Quick verdict
Galaxy S25 leads the measured specs 17-4.
Measured wins
Galaxy A21
4
spec wins
Ties
2
equal specs
Galaxy S25
17
spec wins
Overall winner
Screen size
Technology
Galaxy A21
GSM / CDMA / HSPA / EVDO / LTE
Galaxy S25
GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands
Galaxy A21
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
Galaxy S25
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900 & TD-SCDMA
3G bands
Galaxy A21
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA, CDMA2000 1xEV-DO
Galaxy S25
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
4G bands
Galaxy A21
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
equal specs3.5mm jack
SD card
Stereo speakers
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71 - USA
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
Speed
Galaxy A21
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Galaxy S25
HSPA, LTE (up to 7CA), 5G
5G bands
Galaxy A21
-
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
Announced
Galaxy A21
2020, April 08. Released 2020, June 26
Galaxy S25
2025, January 22
Status
Galaxy A21
Discontinued
Galaxy S25
Available. Released 2025, February 03
Dimensions
Galaxy A21
167.8 x 76.7 x 8.1 mm (6.61 x 3.02 x 0.32 in)
Galaxy S25
146.9 x 70.5 x 7.2 mm (5.78 x 2.78 x 0.28 in)
Weight
Galaxy A21
193 g (6.81 oz)
Galaxy S25
162 g (5.71 oz)
Build
Galaxy A21
Glass front, plastic back, plastic frame
Galaxy S25
Glass front (Gorilla Glass Victus 2), glass back (Gorilla Glass Victus 2), aluminum frame
SIM
Galaxy A21
· Nano-SIM· Nano-SIM + Nano-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
Other
Galaxy A21
-
Galaxy S25
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Armor aluminum 2 frame
Type
Galaxy A21
IPS LCD
Galaxy S25
Dynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak)
Size
Galaxy A21
6.5 inches, 102.0 cm2 (~79.3% screen-to-body ratio)
Galaxy S25
6.2 inches, 94.4 cm2 (~91.1% screen-to-body ratio)
Resolution
Galaxy A21
720 x 1600 pixels, 20:9 ratio (~270 ppi density)
Galaxy S25
1080 x 2340 pixels, 19.5:9 ratio (~416 ppi density)
Protection
Galaxy A21
-
Galaxy S25
Corning Gorilla Glass Victus 2, Mohs level 5
OS
Galaxy A21
Android 10, One UI 2.0
Galaxy S25
Android 15, up to 7 major Android upgrades, One UI 8
Chipset
Galaxy A21
Mediatek MT6765 Helio P35 (12 nm)
Galaxy S25
Qualcomm SM8750-AC Snapdragon 8 Elite (3 nm)
CPU
Galaxy A21
Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
Galaxy S25
Octa-core (2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Galaxy A21
PowerVR GE8320
Galaxy S25
Adreno 830 (1200 MHz)
Card slot
Galaxy A21
microSDXC (dedicated slot)
Galaxy S25
No
Internal
Galaxy A21
32GB 3GB RAM
Galaxy S25
128GB 12GB RAM, 256GB 12GB RAM, 512GB 12GB RAM
Other
Galaxy A21
eMMC 5.1
Galaxy S25
UFS 4.0
Quad
Galaxy A21
16 MP, f/1.8, (wide), 1/3.06", 1.0µm, PDAF 8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm 2 MP (macro) Auxiliary lens
Galaxy S25
-
Features
Galaxy A21
LED flash, panorama, HDR
Galaxy S25
Best Face, LED flash, auto-HDR, panorama
Video
Galaxy A21
1080p@30fps
Galaxy S25
8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS
Triple
Galaxy A21
-
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
Single
Galaxy A21
13 MP, f/2.0, (wide), 1/3.1", 1.12µm
Galaxy S25
12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF
Video
Galaxy A21
1080p@30fps
Galaxy S25
4K@30/60fps, 1080p@30fps
Features
Galaxy A21
-
Galaxy S25
HDR, HDR10+
Loudspeaker
Galaxy A21
Yes
Galaxy S25
Yes, with stereo speakers
3.5mm jack
Galaxy A21
Yes
Galaxy S25
No
Other
Galaxy A21
-
Galaxy S25
High-bitrate audio support
WLAN
Galaxy A21
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Galaxy S25
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Bluetooth
Galaxy A21
5.0, A2DP, LE
Galaxy S25
5.4, A2DP, LE
Positioning
Galaxy A21
GPS, GLONASS, BDS
Galaxy S25
GPS, GLONASS, BDS, GALILEO, QZSS
NFC
Galaxy A21
Yes (market/region dependent)
Galaxy S25
Yes
Radio
Galaxy A21
FM radio
Galaxy S25
No
USB
Galaxy A21
USB Type-C 2.0
Galaxy S25
USB Type-C 3.2, DisplayPort 1.2, OTG
Sensors
Galaxy A21
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Galaxy S25
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Other
Galaxy A21
-
Galaxy S25
Samsung DeX, Samsung Wireless DeX (desktop experience support)
Type
Galaxy A21
Li-Po 4000 mAh
Galaxy S25
Li-Ion 4000 mAh
Charging
Galaxy A21
15W wired
Galaxy S25
25W wired, PD3.0, 50% in 30 min 15W wireless (Qi2 Ready) 4.5W reverse wireless
Colors
Galaxy A21
Black
Galaxy S25
Icy Blue, Mint, Navy, Silver Shadow, Pink Gold, Coral Red, Blue Black
Models
Galaxy A21
SM-A215U, SM-A215U1, SM-S215DL, SM-A215W
Galaxy S25
SM-S931B, SM-S931B/DS, SM-S931U, SM-S931U1, SM-S931W, SM-S931N, SM-S9310, SM-S931E, SM-S931E/DS
SAR
Galaxy A21
1.27 W/kg (head) 0.60 W/kg (body)
Galaxy S25
1.13 W/kg (head) 0.92 W/kg (body)
Price
Galaxy A21
$ 54.44 / C$ 155.00 / £ 79.99 / € 91.89
Galaxy S25
$ 799.99 / C$ 679.99 / £ 429.99 / € 589.90 / ₹ 74,999
SAR EU
Galaxy A21
-
Galaxy S25
1.29 W/kg (head) 1.36 W/kg (body)