Samsung Galaxy A21s vs Xiaomi Redmi Note 9 5G vs Realme 7 5G

General Info

Manufacturer
Samsung	Xiaomi	Realme
Announced
Expected Announcement - May 2020	Not announced yet	2020, November 19
Status
Rumored	Rumored	Coming soon. Exp. release 2020, November 27
Colors
Black, White, Blue	Blue; other colours	Blue, Silver, Mint
Form Factor
Candybar	Candybar	Candybar
Dimension
8.9 mm thickness (0.35 in thickness)	162 x 77.2 x 9.2 mm (6.38 x 3.04 x 0.36 in)	162.1 x 75.1 x 9.1 mm (6.38 x 2.96 x 0.36 in)
Weight
191 g (6.74 oz)	200 g (7.05 oz)	195 g (6.88 oz)
SIM Type
Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)	Dual SIM (Nano-SIM, dual stand-by)	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	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network
HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100	HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G Network
LTE	1, 2, 3, 4, 5, 7, 8, 34, 38, 39, 40, 41	LTE
5G Network
-	1, 3, 41, 78, 79 SA/NSA/Sub6	1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA
Messaging

Build Features
- Fingerprint Sensor	- Fingerprint Sensor (side-mounted)	- Fingerprint Sensor (side-mounted)

OS
Android 10.0	Android 10	Android 10
User Interface
One UI 2.0	MIUI 12	Realme UI 1.0
Processor
Octa-core 2.0 GHz, Exynos 850	Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), MediaTek Dimensity 800U 5G (7 nm)	Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), MediaTek Dimensity 800U 5G (7 nm)
GPU
-	Mali-G57 MC3	Mali-G57 MC3
RAM
3 GB	8 GB	8 GB
Internal Memory
64 GB	256 GB	128 GB
External Memory
microSDXC	microSDXC	microSDXC (uses shared SIM slot)

Type
PLS TFT Capacitive Touchscreen	IPS LCD Screen Corning Gorilla Glass 5 450 nits (typ)	IPS LCD Display 120Hz Refresh rate 480 nits (typ) Corning Gorilla Glass Protection
Colors
16M colors	16M Colour	16M Colour
Size
6.55 inches	6.53 inches	6.5 inches
Resolution
720 x 1600 pixels (268 ppi)	1080 x 2400 pixels (403 ppi)	1080 x 2400 pixels (405 ppi)
Screen-to-Body Ratio
-	82.33%	83.75%
Multi-Touch

Rear Camera
48 MP + 8 MP + 2 MP	48 MP + 8 MP + 2 MP	48 MP + 8 MP + 2 MP + 2 MP
Flash
LED Flash	LED Flash	LED Flash
Features
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) Panorama, HDR	48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (depth) HDR, Panorama	48 MP, f/1.8, 25mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.3, 119˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama
Video
1080p@30fps	1080p@30fps	4K@30fps, 1080p@30/60/120fps; gyro-EIS
Front Camera
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps	13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps	16 MP, f/2.1, 26mm (wide), 1/3.06", 1.0µm HDR 1080p@30fps

GPRS
Yes	Yes	Yes
Edge
Yes	Yes	Yes
3G
HSPA 42.2/5.76 Mbps, LTE-A	HSPA 42.2/5.76 Mbps, LTE-A, 5G	HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G 2.3 Gbps DL
Bluetooth
5.0, A2DP, LE	5.0, A2DP, LE	5.0, A2DP, LE
Wi-Fi
Wi-Fi 802.11 b/g/n, 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, dual-band, Wi-Fi Direct, hotspot
USB
Yes	USB Type-C 2.0	USB Type-C 2.0
GPS
Yes, with A-GPS	Yes, with A-GPS, GLONASS, GALILEO, BDS	Yes, with A-GPS, GLONASS, GALILEO, BDS
Browser
Yes	Yes	Yes

Internal
64 GB, 3 GB RAM or 32 GB, 3 GB RAM	256 GB, 8 GB RAM or 128 GB, 8 GB RAM or 128 GB, 6 GB RAM UFS 2.2	128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.1)
Expandable Storage
microSDXC	microSDXC	microSDXC (uses shared SIM slot)
USB OTG
Supported	Supported	Supported

Fingerprint

Proximity Sensor

Accelerometer Sensor

Magnetic-field Sensor (Compass)

Gyroscope Sensor

NFC

Type
Non-removable Li-Po Battery Battery Charging 10W	Non-removable Li-Po Battery Fast battery charging 18W	Non-removable Li-Po Battery Fast battery charging 30W, 100% in 65 min (advertised)
Capacity
5000 mAh	5000 mAh	5000 mAh
Stand by
-	-	-
Talk Time
-	-	-