Product
Samsung Galaxy A02
Samsung Galaxy A02
Samsung Galaxy M21 2021
Samsung Galaxy M21 2021
Battery
Charging - 15W wired
Type Li-Po 5000 mAh Li-Po 6000 mAh
Body
Build Glass front, plastic back, plastic frame Glass front, plastic back, plastic frame
Dimensions 164 x 75.9 x 9.1 mm (6.46 x 2.99 x 0.36 in) 159 x 75.1 x 9 mm (6.26 x 2.96 x 0.35 in)
SIM Nano-SIMNano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 206 g (7.27 oz) 192 g (6.77 oz)
Comms
Bluetooth 5.1, A2DP, LE 5.0, A2DP, LE
NFC No Yes (market/region dependent)
Positioning GPS, GLONASS GPS, GLONASS, GALILEO, BDS
Radio FM radio FM radio, RDS, recording
USB microUSB 2.0 USB Type-C 2.0
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Resolution 720 x 1600 pixels, 20:9 ratio (~270 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size 6.5 inches, 102.0 cm2 (~81.9% screen-to-body ratio) 6.4 inches, 100.5 cm2 (~84.2% screen-to-body ratio)
Type PLS LCD Super AMOLED, 420 nits (peak)
Features
Sensors Accelerometer Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
  Virtual proximity sensing -
Launch
Announced 2021, January 27 2021, July 21
Status Available. Released 2021, January 27 Available. Released 2021, July 26
Main Camera
Dual 13 MP, f/1.9, (wide), AF2 MP, f/2.4, (macro) -
Features LED flash LED flash, panorama, HDR
Triple - 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 123˚ (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.2, (depth)
Video 1080p@30fps 4K@30fps, 1080p@30fps, 720p@240fps, gyro-EIS
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 32GB 2GB RAM, 32GB 3GB RAM, 32GB 4GB RAM, 64GB 3GB RAM 64GB 4GB RAM, 128GB 6GB RAM
  eMMC 5.1 -
Misc
Colors Black, Blue Charcoal Black, Arctic Blue
Models SM-A022F, SM-A022F/DS, SM-A022M, SM-A022M/DS, SM-A022G, SM-A022G/DS SM-M215G, SM-M215G/DS
SAR - 0.47 W/kg (head)    
SAR EU 0.65 W/kg (head)     1.71 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 1, 3, 5, 7, 8, 20, 38, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA, LTE
Technology GSM / HSPA / LTE GSM / HSPA / LTE
Platform
Chipset Mediatek MT6739W (28 nm) Exynos 9611 (10 nm)
CPU Quad-core 1.5 GHz Cortex-A53 Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)
GPU PowerVR GE8100 Mali-G72 MP3
OS Android 10, upgradable to Android 11, One UI Core 3.1 Android 11, One UI 3.1 Core
Selfie camera
Features - HDR
Single 5 MP, f/2.0 20 MP, f/2.2, 26mm (wide)
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes