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Samsung Galaxy S21 SM-G991B 5G Dual SIM 8GB RAM 128GB vs. Samsung Galaxy S21 Ultra SM-G998B 5G Dual SIM 12GB RAM 256GB
Built-in camera
Yes
Yes
Front camera
Yes
Yes
Effective pixels front camera
10 megapixels
40 megapixels
Number of front cameras
1 ​
1 ​
Camera features
Autofocus, Built-in flash/lamp, Optical image stabilization (OIS), Electronic image stabilization (EIS), Optical zoom
Autofocus, Built-in flash/lamp, Optical image stabilization (OIS), Electronic image stabilization (EIS), Optical zoom
Effective pixels
64 megapixels
108 megapixels
Maximum lens aperture
1.8
1.8
Number of rear cameras
3 ​
4 ​
Sensor format
1/1.76"
1/1,33"
Video recording
Yes
Yes
Max frame rate (highest resolution)
24 fps
24 fps
Max frame rate (regardless of res.)
960 fps
960 fps
Max resolution (highest frame rate)
1280x720 (HD 720) pixels
1280x720 (HD 720) pixels
Maximum resolution (video)
7680x4320 (8K Ultra HD) pixels
7680x4320 (8K Ultra HD) pixels
2G (GSM)
Yes
Yes
3G (UMTS)
Yes
Yes
HSPA+
Yes
Yes
4G (LTE)
Yes
Yes
4G: Speed (down/up)
Cat.20/18: 2000/200 Mbit/s
Cat.20/18: 2000/200 Mbit/s
5G (NR)
Yes
Yes
Frequency range (5G)
FR1 (Sub-6 GHz)
FR1 (Sub-6 GHz), FR2 (mmWave)
Bluetooth
Yes
Yes
Bluetooth codec
aptX, LDAC, SBC
Bluetooth profile
A2DP
A2DP
Bluetooth version
5.1
5.1
Built-in navigation system
Yes
Yes
Type of navigation system
GPS, A-GPS, BeiDou, Galileo, GLONASS
GPS, A-GPS, BeiDou, Galileo, GLONASS
NFC
Yes
Yes
Wireless network (Wi-Fi)
Yes
Yes
Wireless networking standard
802.11a, 802.11b, 802.11g, 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6)
802.11a, 802.11b, 802.11g, 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6)
Data connector
USB
USB
Type of USB connector
USB (Type C)
USB (Type C)
USB On-The-Go (OTG)
Yes
Yes
USB version
3 (Gen 1)
3 (Gen 1)
Headphone output (2.5/3.5 mm)
No
No
Colour
Black, Silver, White, Grey, Purple, Pink
Black, Silver, Blue, White, Grey, Brown
Developed especially for seniors
No
No
Physical keyboard/numpad
No
No
Dimensions (WxHxD)
Depth
7.9 mm
8.9 mm
Height
151.7 mm
165.1 mm
Width
71.2 mm
75.6 mm
Product weight
169 g
227 g
Built-in sensors
Proximity sensor, Accelerometer, Gyroscope, Barometer
Proximity sensor, Accelerometer, Gyroscope, Barometer
Built-in wireless charging
Yes
Yes
Wireless standard
QI, PMA
QI, PMA
Dual SIM card support
Yes
Yes
Hybrid Dual Sim
No
No
Type of Dual SIM
Nano SIM/eSIM
Nano SIM/eSIM, Dual SIM cards
Features
Shock resistant, ANT+, Built-in stereo speakers, Hearing Aid Compatible, Ultra-wideband (UWB)
FM radio, ANT+, Stylus pen support (Active Digitizer), Built-in stereo speakers, Hearing Aid Compatible, Ultra-wideband (UWB)
Security
Fingerprint reader, Face scanner
Fingerprint reader, Face scanner
SIM card
Nano sim
Nano sim
Supports fast charging
Yes
Yes
Water resistant
Yes
Yes
IP code (level of dust/water resistance)
IP68
IP68
Series
Samsung Galaxy S21
Samsung Galaxy S21
Aspect ratio
20:9
20:9
Display features
Scratch resistant display, HDR, 120Hz refresh rate
Scratch resistant display, HDR, 120Hz refresh rate
Display technology
AMOLED
AMOLED
Display
Colour
Colour
Number of colours
16 777 216 colours
16 777 216 colours
Pixel density
421 PPI
515 PPI
Screen resolution (HxV)
1080x2400 pixels
1440x3200 pixels
Screen size
6.2 inches
6.8 inches
Touchscreen
Yes
Yes
Material (body/chassis)
Aluminium, Plastic
Glass, Aluminium
RAM size
8GB
12GB
Keyword
Release year
2021
2021
SAR value
1.51 W/kg
Battery capacity
4000 mAh
5000 mAh
Exchangeable battery
No
No
Graphics processor (GPU)
Yes
Yes
Graphics processor type
ARM Mali-G78 MP14
ARM Mali-G78 MP14
Processor core type
8 (Octa) Core
8 (Octa) Core
Processor speed
2.9 GHz
2.9 GHz
SoC/CPU (System on Chip)
Samsung Exynos 2100
Samsung Exynos 2100
Support for alternative firmware
Memory card reader
No
No
Storage space
128 GB
256 GB