Samsung Galaxy J7 Duo
#3818
vivo X21i
#3726Category Breakdown
Samsung Galaxy J7 Duo
vivo X21i
Performance
67.872.9
Camera
27.919.1
Display
80.482.8
Battery
24.226.4
Build
0.20.2
Connectivity
49.356.0
Audio
8.98.9
Overall
38.339.0
Summary
- The Samsung Galaxy J7 Duo features a 5.5-inch Super AMOLED display with a resolution of 720 x 1280 pixels, while the vivo X21i has a larger 6.28-inch Super AMOLED display with a higher resolution of 1080 x 2280 pixels, resulting in better pixel density.
- In terms of performance, the J7 Duo is powered by the Exynos 7885 chipset, whereas the X21i utilizes the Mediatek Helio P60, offering slightly better processing capabilities.
- The J7 Duo's camera setup includes a 13 MP main sensor and an 8 MP selfie camera, while the X21i has a 12 MP rear camera and a significantly higher 24 MP front camera, enhancing selfie quality.
- Battery capacity is also higher in the X21i at 3425 mAh compared to the J7 Duo's 3000 mAh, and it supports faster charging at 18W.
- Both devices run on Android, with the J7 Duo on Android 8.0 and the X21i on Android 8.1, but the X21i's Funtouch OS offers a different software experience.
Side-by-side Specification Comparison
Samsung Galaxy J7 Duo
vivo X21i
General
Release Date
2018
2018
Announced
2018
2018
Description
N/A
N/A
Display
Size
5.5"
6.28"
Type
Super AMOLED
Super AMOLED
Resolution
720 x 1280 pixels, 16:9 ratio (~267 ppi density)
1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
PPI
720
1080
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
N/A
N/A
Performance
Chipset
Exynos 7885 (14 nm)
Mediatek MT6771 Helio P60 (12 nm)
CPU
Octa-core (2x2.2 GHz Cortex-A73 & 6x1.6 GHz Cortex-A53)
Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
GPU
Mali-G71
Mali-G72 MP3
Memory
32GB 3GB RAM, 32GB 4GB RAM
64GB 6GB RAM, 128GB 4GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (dedicated slot)
microSDXC (uses shared SIM slot)
Camera
Main Camera
13 MP, f/1.9, AF5 MP, f/1.9, (depth)
12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF5 MP, f/2.4, (depth)
Main Camera Features
LED flash, panorama, HDR
LED flash, HDR, panorama
Front Camera
8 MP, f/1.9
24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm
Front Camera Features
LED flash
N/A
Video Recording
1080p@30fps
1080p@30fps
Selfie Video
1080p@30fps
N/A
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
3000 mAh
3425 mAh
Battery Details
Li-Ion 3000 mAh, removable
Li-Ion 3425 mAh, non-removable
Charging Details
N/A
18W wired
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
153.5 x 77.2 x 8.2 mm (6.04 x 3.04 x 0.32 in)
154.4 x 75 x 7 mm (6.08 x 2.95 x 0.28 in)
Weight
174 g
159 g
Materials
N/A
N/A
Colors
Black, Gold, Rose Gold, White, Blue
Black, Aurora White, Ruby Red, Night Purple
Foldable
✗
✗
SAR
N/A
N/A
Connectivity
SIM
Single SIM (Micro-SIM) or Dual SIM (Micro-SIM, dual stand-by)
Nano-SIM + Nano-SIM
Network
GSM / HSPA / LTE
GSM / CDMA / HSPA / LTE
Network Speed
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
HSPA, LTE
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
4.2, A2DP, LE
5.0, A2DP, LE
NFC
✗
✗
USB
microUSB 2.0
microUSB 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS, BDS
GPS, GLONASS
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 8.0 (Oreo), upgradable to Android 9.0 (Pie)
Android 8.1 (Oreo), Funtouch 4
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (front-mounted), accelerometer, proximity
Fingerprint (rear-mounted), accelerometer, proximity, compass