Phone Comparison - Samsung Galaxy Note 9 vs Samsung Galaxy A51 vs Samsung Galaxy S21 Ultra 5G

Price Comparison (India) -

general General Info

Manufacturer Samsung Samsung Samsung
Announced August 2018 December 2019 2021, January 14
Status Available - August 2018 Coming Soon - December 12, 2019 Coming soon. Exp. release 2021, January 29
Price Rs. 67,900 ($999.00) [Similarly Priced] Rs. 23,999 ($0.00) [Similarly Priced] Rs. 105,999 ($0.00) [Similarly Priced]
Colors Metallic copper, Lavender purple, Ocean blue, Midnight black Prism Crush White, Black, Pink, Blue Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown
Form Factor Candybar Candybar Candybar
Dimension 161.9 x 76.4 x 8.8 mm
(6.37 x 3.01 x 0.35 in)
158.4 x 73.7 x 7.9 mm
(6.24 x 2.9 x 0.31 in)
165.1 x 75.6 x 8.9 mm
(6.5 x 2.98 x 0.35 in)
Weight 201 g (7.09 oz) 172 g (6.07 oz) 227 g (8.01 oz)
SIM Type Single SIM (Nano-SIM), Hybrid Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM and/or eSIM), Hybrid Dual SIM (Nano-SIM, dual stand-by)
2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only)
CDMA2000 1xEV-DO
3G Network HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100) LTE (unspecified) LTE
5G Network - - SA/NSA/Sub6/mmWave
Messaging SMS, MMS, Push Mail, EMail, IM
Build Features - Fingerprint Sensor
- Samsung Pay (Visa, MasterCard certified)
- IP68 dust/water proof (up to 1.5m for 30 mins)
- Stylus (Bluetooth integration)
- Fingerprint Sensor(In-display)
- Fingerprint Sensor (under display, ultrasonic)
Samsung Pay (Visa, MasterCard certified)
IP68 dust/water resistant (up to 1.5m for 30 mins)
Stylus support
Samsung DeX, Samsung Wireless DeX (desktop experience support) ANT+
Notification LED Yes - -

hardware Hardware and OS

OS Android 8.1 (Oreo) Android 9.0 (Pie) Android 11
User Interface - One UI One UI 3.0
Processor Octa-core (4x2.7 GHz Mongoose M3 & 4x1.8 GHz Cortex-A55) - EMEA
Octa-core (4x2.8 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver) - USA/LATAM, China, Exynos 9810 Octa - EMEA
Qualcomm SDM845 Snapdragon 845 - USA/LATAM, China
Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International / Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680 - USA/China/Korea, Exynos 2100 - Global / Qualcomm Snapdragon 875 - USA
GPU Mali-G72 MP18 - EMEA
Adreno 630 - USA/LATAM, China
Mali-G72 MP3 Mali-G78 MP14 - International / Adreno 660 - USA/China/Korea
RAM 6/8 GB 8 GB 16 GB
Internal Memory 128/512 GB 128 GB 512 GB
External Memory microSD, up to 512 GB (uses SIM 2 slot) - dual SIM model only microSD, up to 512 GB (dedicated slot) microSDXC (uses shared SIM slot)

display Display

Type Super AMOLED Capacitive Touchscreen, Corning Gorilla Glass 5 Full HD+ Infinity-O Super AMOLED Capacitive Touchscreen QHD+ Dynamic AMOLED 2X Display
120Hz Refresh Rate
HDR10+
1500 nits (peak)
Corning Gorilla Glass Victus
Always-on display
Colors 16M colors 16M colors 16M Colour
Size 6.4 inches 6.5 inches 6.8 inches
Resolution 1440 x 2960 pixels (514 ppi) 1080 x 2340 pixels (396 ppi) 1440 x 3200 pixels (516 ppi)
Screen-to-Body Ratio 84.15% 89.06% 89.46%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes no
Radio No FM radio FM radio (Snapdragon model only; market/operator dependent)
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera Dual 12 MP + 12 MP 48 MP + 12 MP + 5 MP + 5 MP 108 MP + 10 MP + 10 MP + 12 MP + 0.3 MP
Flash LED flash LED Flash LED flash
Features 12 MP, f/1.5-2.4, 26mm, 1/2.55", 1.4µm, dual pixel PDAF, OIS
12 MP, f/2.4, 52mm, 1/3.6", 1µm, AF, OIS, 2x optical zoom
Dual Video Call, Auto-HDR
48 MP, f/1.8, (wide), 1/2", 0.8µm, PDAF
12 MP, f/2.2, 13mm (ultrawide)
5 MP, f/2.2, depth sensor
5 MP, f/2.4, macro camera
Panorama, HDR
108 MP (2nd gen), f/1.8, 26mm (wide), 1/1.33", 0.8µm, PDAF, Laser AF, OIS
10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom
10 MP, f/2.4, 70mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom
12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video
auto-HDR, panorama
Video 2160p@60fps, 1080p@240fps, 720p@960fps, HDR, Dual-Video Rec 2160p@30fps, 1080p@30fps 8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS
Front Camera 8 MP, f/1.7, 25mm, 1/3.6", 1.22µm, AF, Dual video call, Auto-HDR, 1440p@30fps [Similar] 32 MP, f/2.0, 25mm (wide)
HDR
1080p@30fps [Similar]
40 MP, f/2.2, 26mm (wide), 0.7µm, PDAF
Dual video call, Auto-HDR
4K@30/60fps, 1080p@30fps [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA 42.2/5.76 Mbps, LTE-A (5CA) Cat18 1200/200 Mbps HSPA, LTE-A HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G
Bluetooth 5.0, A2DP, LE, aptX 5.0, A2DP, LE 5.2, A2DP, LE
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot
USB 3.1, Type-C 1.0 reversible connector 2.0, Type-C 1.0 reversible connector, USB On-The-Go USB Type-C 3.2, USB On-The-Go
GPS Yes, with A-GPS, GLONASS, BDS, GALILEO Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, BDS, GALILEO
Browser HTML5 Yes Yes

memory User Memory

Internal 128/512 GB, 6/8 GB RAM 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 64 GB, 4 GB RAM 512 GB, 16 GB RAM or 256 GB, 12 GB RAM or 128 GB, 12 GB RAM UFS 3.1
Expandable Storage microSD, up to 512 GB (uses SIM 2 slot) - dual SIM model only microSD, up to 512 GB (dedicated slot) microSDXC (uses shared SIM slot)
USB OTG Not Supported Supported Supported

Apps Sensors

Fingerprint fingerprint supported fingerprint supported fingerprint supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
Magnetic-Field Sensor (Compass) magnetic field sensor present magnetic field sensor present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor present gyroscope sensor present
Barometer Sensor barometer sensor present barometer sensor not present barometer sensor present
Heart-rate Sensor heart rate sensor present heart rate sensor not present heart rate sensor not present
NFC NFC supported NFC not supported NFC supported

battery Battery

Type Non-removable Li-Ion Battery Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Fast battery charging 25W
USB Power Delivery 3.0
Fast Qi/PMA wireless charging 15W
Reverse wireless charging 4.5W
Capacity 4000 mAh 4000 mAh 5000 mAh
Stand by - - -
Talk Time - - -