Phone Comparison - Samsung Galaxy A31 vs Samsung Galaxy A21s vs Samsung Galaxy Z Fold3 5G

general General Info

Manufacturer Samsung Samsung Samsung
Announced 2020, March 24 Expected Announcement - May 2020 2021, August 11
Status Coming Soon - April 2020 Rumored Coming soon. Exp. release 2021, August 27
Colors Prism Crush Black, Prism Crush Blue, Prism Crush Red, Prism Crush White Black, White, Blue Black; other colors
Form Factor Candybar Candybar Candybar
Dimension 159.3 x 73.1 x 8.6 mm
(6.27 x 2.88 x 0.34 in)
8.9 mm thickness
(0.35 in thickness)
Unfolded: 158.2 x 128.1 x 6.4 mm / Folded: 158.2 x 67.1 x 14.4-16 mm
(Unfolded: 6.23 x 5.04 x 0.25 in / Folded: 6.23 x 2.64 x 0.57-0.63 in)
Weight 185 g (6.53 oz) 191 g (6.74 oz) 271 g (9.56 oz)
SIM Type Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Nano-SIM and/or eSIM
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
CDMA2000 1xEV-DO
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1900 / 2100
4G Network LTE (unspecified) LTE LTE 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
5G Network - - 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave
Messaging
Build Features - Fingerprint Sensor (under display, optical)
- Fingerprint Sensor
- Fingerprint Sensor (side-mounted)
IPX8 water resistant (up to 1.5m for 30 mins)
Stylus support
Samsung DeX (desktop experience support)
Samsung Pay (Visa, MasterCard certified)
Ultra Wideband (UWB) support

hardware Hardware and OS

OS Android 10.0 Android 10.0 Android 11
User Interface One UI 2.0 One UI 2.0 One UI 3.5
Processor Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55), Mediatek MT6768 Helio P65 (12nm) Octa-core 2.0 GHz, Exynos 850 Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680), Qualcomm SM8350 Snapdragon 888 5G (5 nm)
GPU Mali-G52 MC2 - Adreno 660
RAM 6 GB 3 GB 12 GB
Internal Memory 128 GB 64 GB 512 GB
External Memory microSDXC microSDXC No

display Display

Type Super AMOLED Capacitive Touchscreen PLS TFT Capacitive Touchscreen Foldable Dynamic AMOLED 2X Screen
120Hz Refresh Rate
HDR10+
Cover display: - 6.23 inches FHD+ Super AMOLED Screen, 816 x 2260 pixels, 25:9 ratio
120Hz Refresh Rate
Corning Gorilla Glass Victus
Colors 16M colors 16M colors 16M colors
Size 6.4 inches 6.55 inches 7.6 inches
Resolution 1080 x 2400 pixels (411 ppi) 720 x 1600 pixels (268 ppi) 1768 x 2208 pixels (372 ppi)
Screen-to-Body Ratio 85.01% - 89.81%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes no
Radio - - No
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes

camera Camera

Rear Camera 48 MP + 8 MP + 5 MP + 5 MP 48 MP + 8 MP + 2 MP 12 MP + 12 MP + 12 MP
Flash LED flash LED Flash LED Flash
Features 48 MP, f/2.0, (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.4, (macro)
5 MP, f/2.4, (depth)
panorama, HDR
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
12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, Dual Pixel PDAF, OIS
12 MP, f/2.4, 52mm (telephoto), 1/3.6", 1.0µm, PDAF, OIS, 2x optical zoom
12 MP, f/2.2, 123˚, 12mm (ultrawide), 1.12µm
HDR, Panorama
Video 1080p@30fps 1080p@30fps 4K@60fps, 1080p@60/240fps (gyro-EIS), 720p@960fps (gyro-EIS), HDR10+
Front Camera 20 MP, f/2.2, 0.8µm
HDR
1080p@30fps [Similar]
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm
HDR, Panorama
1080p@30fps [Similar]
16 MP, (wide), 1.0µm, under display
Cover camera:
10 MP, f/2.2, 26mm (wide), 1/3", 1.22µm
HDR
4K@30fps, 1080p@30fps, gyro-EIS [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA, LTE-A HSPA 42.2/5.76 Mbps, LTE-A HSPA 42.2/5.76 Mbps, LTE-A (7CA) Cat20 2000/200 Mbps, 5G
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE 5.2, A2DP, LE, aptX HD
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct, hotspot
USB 2.0, Type-C 1.0 reversible connector, USB On-The-Go Yes USB Type-C 3.2
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS Yes, with A-GPS, GLONASS, GALILEO, BDS
Browser Yes Yes Yes

memory User Memory

Internal 128 GB, 6 GB RAM or 64 GB, 4 GB RAM (UFS 2.1) 64 GB, 3 GB RAM or 32 GB, 3 GB RAM 512 GB, 12 GB RAM or 256 GB, 12 GB RAM (UFS 3.1)
Expandable Storage microSDXC microSDXC No
USB OTG 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 not present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor not present gyroscope sensor present
Barometer Sensor barometer sensor not present barometer sensor not present barometer sensor present
NFC NFC not supported NFC supported NFC supported

battery Battery

Type Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Battery Charging 10W
Non-removable Li-Po Battery
Fast battery charging 25W
Fast wireless charging 11W
Reverse wireless charging 4.5W
Capacity 5000 mAh 5000 mAh 4400 mAh
Stand by - - -
Talk Time - - -