| Product |
Xiaomi Redmi 2
|
Samsung Galaxy A21
|
| Battery |
| Charging |
10W wired, QC1 |
15W wired |
| Type |
Li-Po 2200 mAh, removable |
Li-Po 4000 mAh |
| Body |
| Build |
Glass front (Gorilla Glass 2), plastic back, plastic frame |
Glass front, plastic back, plastic frame |
| Dimensions |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
167.8 x 76.7 x 8.1 mm (6.61 x 3.02 x 0.32 in) |
| SIM |
Dual SIM (Micro-SIM, dual stand-by) |
Nano-SIMNano-SIM + Nano-SIM |
| Weight |
133 g (4.69 oz) |
193 g (6.81 oz) |
| Comms |
| Bluetooth |
4.0, A2DP, LE |
5.0, A2DP, LE |
| NFC |
No |
Yes (market/region dependent) |
| Positioning |
GPS, GLONASS, BDS |
GPS, GLONASS, BDS |
| Radio |
Stereo FM radio |
FM radio |
| USB |
microUSB 2.0, OTG |
USB Type-C 2.0 |
| WLAN |
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 |
| Display |
| Protection |
Corning Gorilla Glass 2 |
- |
| Resolution |
720 x 1280 pixels, 16:9 ratio (~312 ppi density) |
720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Size |
4.7 inches, 60.9 cm2 (~67.6% screen-to-body ratio) |
6.5 inches, 102.0 cm2 (~79.3% screen-to-body ratio) |
| Type |
IPS LCD |
IPS LCD |
| Features |
| Sensors |
Accelerometer, gyro, proximity, compass |
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass |
| Launch |
| Announced |
2015, January. Released 2015, January |
2020, April 08 |
| Status |
Discontinued |
Available. Released 2020, June 26 |
| Main Camera |
| Features |
LED flash, HDR |
LED flash, panorama, HDR |
| Quad |
- |
16 MP, f/1.8, (wide), 1/3.06", 1.0µm, PDAF
8 MP, f/2.2, (ultrawide), 1/4.0", 1.12µm
2 MP, f/2.4, (macro)
2 MP, f/2.4, (depth) |
| Single |
8 MP, f/2.2, 28mm (wide), 1/3.2", 1.4µm, AF |
- |
| Video |
1080p@30fps |
1080p@30fps |
| Memory |
| Card slot |
microSDHC (dedicated slot) |
microSDXC (dedicated slot) |
| Internal |
8GB 1GB RAM, 16GB 2GB RAM |
32GB 3GB RAM |
| |
eMMC 4.5 |
eMMC 5.1 |
| Misc |
| Colors |
Black, White, Yellow, Pink, Green |
Black |
| Models |
2014817, 2014818, 2014816, HM2014821 |
SM-A215U, SM-A215U1, SM-S215DL, SM-A215W |
| SAR |
0.70 W/kg (head) 0.70 W/kg (body) |
1.27 W/kg (head) 0.60 W/kg (body) |
| Network |
| 2G bands |
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
GSM 850 / 900 / 1800 / 1900 |
| 3G bands |
HSDPA 850 / 1900 / 2100 |
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - USA |
| 4G bands |
3, 7, 38, 39, 40, 41 |
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71 - USA |
| Speed |
HSPA, LTE Cat4 150/50 Mbps |
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Technology |
GSM / HSPA / LTE |
GSM / CDMA / HSPA / EVDO / LTE |
| |
TD-SCDMA |
CDMA2000 1xEV-DO |
| Our Tests |
| Audio quality |
Noise -94.8dB / Crosstalk -95.8dB |
- |
| Battery (old) |
Endurance rating 55h |
- |
| Camera |
Photo / Video |
- |
| Display |
Contrast ratio: 974:1 (nominal), 1.763 (sunlight) |
- |
| Loudspeaker |
Voice 70dB / Noise 70dB / Ring 77dB |
- |
| Performance |
Basemark OS II 2.0: 511 |
- |
| Platform |
| Chipset |
Qualcomm MSM8916 Snapdragon 410 (28 nm) |
Mediatek MT6765 Helio P35 (12 nm) |
| CPU |
Quad-core 1.2 GHz Cortex-A53 |
Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) |
| GPU |
Adreno 306 |
PowerVR GE8320 |
| OS |
Android 4.4.4 (KitKat), MIUI 6.0 |
Android 10, One UI 2.0 |
| Selfie camera |
| Single |
2 MP |
13 MP, f/2.0, (wide), 1/3.1", 1.12µm |
| Video |
720p |
1080p@30fps |
| Sound |
| 3.5mm jack |
Yes |
Yes |
| Loudspeaker |
Yes |
Yes |
