Screen size
Galaxy M086.7"
Galaxy S21 Ultra 5GWinner: 6.8"+1.5%
Quick verdict
Galaxy S21 Ultra 5G leads the measured specs 17-5.
Measured wins
Galaxy M08
5
spec wins
Ties
1
equal specs
Galaxy S21 Ultra 5G
17
spec wins
Overall winner
Screen size
Technology
Galaxy M08
GSM / HSPA / LTE
Galaxy S21 Ultra 5G
GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands
Galaxy M08
GSM 850 / 900 / 1800 / 1900
Galaxy S21 Ultra 5G
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900 & TD-SCDMA
3G bands
Galaxy M08
HSDPA 850 / 900 / 2100
Galaxy S21 Ultra 5G
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 , CDMA2000 1xEV-DO
4G bands
Galaxy M08
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
equal specsWeight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
3.5mm jack
SD card
Stereo speakers
1, 3, 5, 7, 8, 20, 28, 38, 40, 41
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
Speed
Galaxy M08
HSPA, LTE
Galaxy S21 Ultra 5G
HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
5G bands
Galaxy M08
-
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
Announced
Galaxy M08
2026, October 01
Galaxy S21 Ultra 5G
2021, January 14
Status
Galaxy M08
Released Oct 2026
Galaxy S21 Ultra 5G
Available. Released 2021, January 29
Dimensions
Galaxy M08
167.4 x 77.4 x 8 mm (6.59 x 3.05 x 0.31 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 M08
197 g (6.95 oz)
Galaxy S21 Ultra 5G
227 g (Sub6), 229 g (mmWave) (8.01 oz)
Build
Galaxy M08
Glass front, plastic back, plastic frame
Galaxy S21 Ultra 5G
Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame
SIM
Galaxy M08
Nano-SIM + Nano-SIM
Galaxy S21 Ultra 5G
· Nano-SIM + eSIM· Nano-SIM + Nano-SIM + eSIM (max 2 at a time)
Other
Galaxy M08
IP64 dust tight and water resistant (water splashes)
Galaxy S21 Ultra 5G
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Stylus support
Type
Galaxy M08
PLS LCD, 90Hz
Galaxy S21 Ultra 5G
Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
Size
Galaxy M08
6.7 inches, 108.4 cm2 (~83.6% screen-to-body ratio)
Galaxy S21 Ultra 5G
6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
Resolution
Galaxy M08
720 x 1600 pixels, 20:9 ratio (~262 ppi density)
Galaxy S21 Ultra 5G
1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
Protection
Galaxy M08
-
Galaxy S21 Ultra 5G
Corning Gorilla Glass Victus
OS
Galaxy M08
Android 17, up to 6 major OS updates, One UI 9
Galaxy S21 Ultra 5G
Android 11, up to 4 major Android upgrades, One UI 6.1
Chipset
Galaxy M08
Mediatek Helio G99+ (6 nm)
Galaxy S21 Ultra 5G
Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
CPU
Galaxy M08
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
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 M08
Mali-G57 MC2
Galaxy S21 Ultra 5G
Mali-G78 MP14 - InternationalAdreno 660 - USA/China
Card slot
Galaxy M08
microSDXC (dedicated slot)
Galaxy S21 Ultra 5G
No
Internal
Galaxy M08
64GB 4GB 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 M08
-
Galaxy S21 Ultra 5G
UFS 3.1
Dual
Galaxy M08
50 MP, f/1.8, (wide), 1/2.76", 0.64µm, PDAF Auxiliary lens
Galaxy S21 Ultra 5G
-
Features
Galaxy M08
LED flash
Galaxy S21 Ultra 5G
Laser AF, LED flash, auto-HDR, panorama
Video
Galaxy M08
1080p@30/60fps
Galaxy S21 Ultra 5G
8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
Quad
Galaxy M08
-
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 M08
8 MP, f/2.0, (wide), 1/4.0", 1.12µm
Galaxy S21 Ultra 5G
40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF
Video
Galaxy M08
Yes
Galaxy S21 Ultra 5G
4K@30/60fps, 1080p@30fps
Features
Galaxy M08
-
Galaxy S21 Ultra 5G
HDR
Loudspeaker
Galaxy M08
Yes
Galaxy S21 Ultra 5G
Yes, with stereo speakers
3.5mm jack
Galaxy M08
Yes
Galaxy S21 Ultra 5G
No
Other
Galaxy M08
-
Galaxy S21 Ultra 5G
High-bitrate audio support
WLAN
Galaxy M08
Wi-Fi 802.11 a/b/g/n/ac, dual-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 M08
5.3, A2DP, LE
Galaxy S21 Ultra 5G
5.2, A2DP, LE
Positioning
Galaxy M08
GPS, GLONASS, GALILEO, BDS
Galaxy S21 Ultra 5G
GPS, GLONASS, BDS, GALILEO
NFC
Galaxy M08
No
Galaxy S21 Ultra 5G
Yes
Radio
Galaxy M08
FM radio
Galaxy S21 Ultra 5G
FM radio (Snapdragon model only; market/operator dependent)
USB
Galaxy M08
USB Type-C 2.0
Galaxy S21 Ultra 5G
USB Type-C 3.2, OTG
Sensors
Galaxy M08
Fingerprint (side-mounted), accelerometer, proximity
Galaxy S21 Ultra 5G
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Other
Galaxy M08
-
Galaxy S21 Ultra 5G
Samsung DeX, Samsung Wireless DeX (desktop experience support) Ultra Wideband (UWB) support
Type
Galaxy M08
6000 mAh
Galaxy S21 Ultra 5G
Li-Ion 5000 mAh
Charging
Galaxy M08
25W wired
Galaxy S21 Ultra 5G
25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless
Colors
Galaxy M08
Silver
Galaxy S21 Ultra 5G
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Models
Galaxy M08
SM-M085F, SM-M085F/DS
Galaxy S21 Ultra 5G
SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980
SAR
Galaxy M08
0.62 W/kg (head)
Galaxy S21 Ultra 5G
0.77 W/kg (head) 1.02 W/kg (body)
SAR EU
Galaxy M08
0.75 W/kg (head) 1.29 W/kg (body)
Galaxy S21 Ultra 5G
0.71 W/kg (head) 1.58 W/kg (body)
Price
Galaxy M08
About 160 EUR
Galaxy S21 Ultra 5G
$ 200.79 / C$ 407.99 / £ 207.95 / € 259.99