Home Phone comparison Samsung Galaxy A51 and Xiaomi Redmi 7 - Which is better?

Samsung Galaxy A51 vs Xiaomi Redmi 7

41 out 100
Samsung Galaxy A51
VS
31 out 100
Xiaomi Redmi 7
Samsung Galaxy A51
Xiaomi Redmi 7

Compared 2 smartphones : Samsung Galaxy A51 Manufactured in December, 2019, with display 6.5 with chipsetSamsung Exynos 9 Octa 9611, vs Xiaomi Redmi 7, Manufactured in May, 2019 with chipsetQualcomm Snapdragon 632. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy A51
  • Larger display: 6.5in
  • Higher pixel density: 405ppi
  • Lighter design: 172g vs 180g
  • Newer Bluetooth version: 5 vs 4.2
  • Supports Dolby Atmos
Reasons to choose Xiaomi Redmi 7
  • Infrared port

Versions

Available versions and configurations
Memory Options - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB		 - 2/16 GB
- 2/32 GB
- 3/32 GB
- 3/64 GB
- 4/64 GB

Review

Key Specs Samsung Galaxy A51 and Xiaomi Redmi 7
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
Customize your score
Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Samsung Galaxy A51
vs
Xiaomi Redmi 7

Display

Display quality comparison
Type Super AMOLED IPS LCD
Size 6.5 in 6.26 in
Resolution 1080x2400 pixels 720x1520 pixels
Aspect ratio 20:9 19:9
Pixel density 405 ppi 269 ppi
Refresh rate 60 Hz 60 Hz
Adaptive refresh rate No No
Max brightness 400 nits 450 nits
HDR support No No
Screen-to-body ratio 87.5 % 80.8 %
Features Always-On Display n/a
Display test
Peak brightness (auto)
Samsung Galaxy A51
631 nits
Xiaomi Redmi 7
438 nits
sRGB gamut98.8 %99.8 %
PWM (Flicker)242 Hz100 Hz
Response time25 ms25.1 ms
Contrast∞ Infinite987:1
Sources: NotebookCheck [Samsung Galaxy A51], [Xiaomi Redmi 7]

Design & Build

Design and ergonomics comparison
Height 158.5 mm (6.24 in) 158.6 mm (6.24 in)
Width 73.6 mm (2.9 in) 76.4 mm (3.01 in)
Thickness 7.9 mm (0.31 in) 8.4 mm (0.33 in)
Weight 172 g (6.07 oz) 180 g (6.35 oz)
Water resistance No No
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - White
- Black		 - Black
- Blue
Fingerprint sensor Yes In-Display Yes rear
Screen-to-body ratio
Samsung Galaxy A51
87.5 %
Xiaomi Redmi 7
80.8 %

Performance

Testing Samsung Galaxy A51 and Xiaomi Redmi 7 In benchmarks
Processor
Chipset Samsung Exynos 9 Octa 9611 Qualcomm Snapdragon 632
Max Frequency 2300 MHz 1800 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 4/1.8 (Kryo 250 Silver (Cortex-A53))
- 4/1.8 (Kryo 250 Gold (Cortex-A73)
Process Samsung Samsung
Transistor Size 10 nm 14 nm
Neural Processor Yes Hexagon 546
Graphics Mali-G72 MP3 Adreno 506
GPU Cores 54 96
GPU Frequency 850 MHz 650 MHz
FLOPS 113.8 GFLOPS 124.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A51
512
Xiaomi Redmi 7
489
Geekbench 6 (Multi-Core)
Samsung Galaxy A51
1556
Xiaomi Redmi 7
1531
Geekbench 6 (Single-Core)512489
Geekbench 6 (Multi-Core)15561531
AnTuTu 10
AnTuTu 10
Samsung Galaxy A51
268760
Xiaomi Redmi 7
182478
CPU8385773802
GPU4516617408
Memory6382844054
UX7590947214
NanoReview Score268760182478
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A51
812
Xiaomi Redmi 7
n/a
Max Surface Temp.42.2 °Cn/a
Stability95 %n/a
Graphics Test4 fpsn/a
Graphics Score812n/a
Sources: 3DMark [Samsung Galaxy A51]

Memory

RAM
RAM Size - 4 GB
- 6 GB		 - 2 GB
- 3 GB
- 4 GB
Memory Type LPDDR4X LPDDR3
Memory Frequency 1866 MHz 933 MHz
Channels 2 1
Storage
Storage Capacity- 64 GB
- 128 GB		- 16 GB
- 32 GB
- 64 GB
Storage TypeUFS 2.0eMMC 5.1
Memory CardMicroSDMicroSD

Software

OS Android 10 (Upgradeable to Android 13) Android 9.0 (Upgradeable to Android 10)
OS Size 23 GB 8 GB
UI Skin One UI 5.1 MIUI 11

Battery

Volume 4000 mAh 4000 mAh
Max Charging Power 15 W 10 W
Battery Type Li-Po Li-Po
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging Yes (40% in 35 min) No
Full Charge Time 1:50 h 2:20 h
Battery Life Test
Battery Life
Samsung Galaxy A51
17:53
Xiaomi Redmi 7
16:39
Web Browsing07:15 h06:15 h
Video Playback11:25 h09:28 h
Games04:49 h04:01 h
Standby Mode81 h87 h

Main camera

Matrix 48 MP 12 MP
Photo resolution 8000x6000 pixels 4000x3000 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording Yes (Up to 30 fps) No
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 120 fps (720p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 12 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode		 Bokeh effect
Main lens
Matrix48 MP12 MP
Aperturef/2.0f/2.2
Focal length26 mmn/a
SensorSony IMX582Sony IMX486
Sensor size1/21/2.9
Pixel size0.8 μm1.25 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
Pixel size1.12 μmn/a
StabilizationDigitaln/a

Front camera

Matrix 32 MP 8 MP
Photo resolution 6560x4928 pixels 3264x2448 pixels
Aperture f/2.2 f/2.0
Focal length 26 mm n/a
Sensor Samsung S5KGD1 CMOS
Sensor size 1/2.8 1/4.0
Pixel size 0.8 μm 1.12 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 30 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 4.2
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE, A2DP
USB type USB Type-C Micro USB
USB version 2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- USB-Host mode
- OTG
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
NFC* Yes No
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 2100 / 2600GSM 850, GSM 900, GSM 1800, GSM 1900
3G BandsUMTS 850 / 900 / 1900 / 2100HSDPA 900, HSDPA 2100
LTE Bands*LTE (B850/B900/B1800/B2100/B2600)LTE (B800/B900/B1800/B1900/B2300/B2500/B2600)
LTE category126
5G SupportNoNo

Sound

Speakers Mono Mono
3.5 mm Jack Yes Yes
FM Radio Yes Yes
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy A51
81.7 dB
Xiaomi Redmi 7
82.8 dB

Other

Class Mid-range Budget
Announced December, 2019 yr March, 2019 yr
Release Date December, 2019 yr May, 2019 yr
Launch Price ($) 399 130
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy A51 the clear winner in this comparison.

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