Samsung Galaxy J3(2017) vs Galaxy S21 Ultra 5G

Specs compared side by side, measured on real phones shared by owners with the Device Info app.

Samsung Galaxy J3(2017)Samsung Galaxy J3(2017)Exynos 7570Change
Samsung Galaxy S21 Ultra 5GSamsung Galaxy S21 Ultra 5GSnapdragon 888Exynos 21002 chip versionsChange

Key differences

  1. Chipset: the Galaxy J3(2017) uses the Exynos 7570 (14 nm), the Galaxy S21 Ultra 5G the Exynos 2100 (5 nm Samsung). The Galaxy J3(2017)'s fastest core runs at 1.43 GHz, the Galaxy S21 Ultra 5G's at 2.91 GHz.
  2. Screen: 5 inches on the Galaxy J3(2017), 6.8 inches on the Galaxy S21 Ultra 5G. Up to 60 Hz on the Galaxy J3(2017), 120 Hz on the Galaxy S21 Ultra 5G.
  3. Battery: 2,400 mAh on the Galaxy J3(2017), 4,855 mAh on the Galaxy S21 Ultra 5G.
  4. Main camera: 12.9 MP on the Galaxy J3(2017), 12 MP on the Galaxy S21 Ultra 5G.

Chipset

Chipset
Exynos 7570Exynos 2100
Process
14 nm5 nm Samsung
CPU
4× 1.43 GHz Cortex-A531× 2.91 GHz Cortex-X1
3× 2.81 GHz Cortex-A78
4× 2.21 GHz Cortex-A55
Top CPU speed
1.43 GHz2.91 GHz
CPU cores
48
GPU
Mali-T720Mali-G78

Memory

Versions seen
2GB | 16GB10GB | 128GB
16GB | 512GB
RAM type
LPDDR3LPDDR5

Display

Size
5 in6.8 in
Resolution
720 × 12801440 × 3200
Pixel density
295 ppi515 ppi
Refresh rates
60 Hz120 Hzalso 48, 60, 96
HDR
—HDR10, HDR10+, HLG

Battery

Capacity
2,400 mAh4,855 mAh

Cameras

Back camera 1
12.9 MP4144 × 3106 · f/1.9 · 4.3 mm12 MP4000 × 3000 · f/1.8 · 6.7 mm · OIS
Back camera 2
—12 MP4000 × 3000 · f/2.2 · 2.2 mm
Front camera 1
5 MP2576 × 1932 · f/2.4 · 1.86 mm10 MP3648 × 2736 · f/2.2 · 3.8 mm
Front camera 2
—7.1 MP3216 × 2208 · f/2.2 · 3.8 mm

Megapixels are what Android reports to apps. Many phones combine pixels by default, so the advertised megapixels can be higher.

Connectivity

Wi-Fi
—Wi-Fi 6E
6 GHz Wi-Fi
—Yes
Bluetooth LE Audio
—No
NFC
NoYes
UWB
NoYes
USB host
YesYes

Software

Android
Android 9Android 13–15
UI
—One UI 7.0
Released with
Android 7.0Android 11
Widevine DRM
L3L1

Sensors

Sensors
4 sensors43 sensors
Galaxy J3(2017) full specs Galaxy S21 Ultra 5G full specs

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From phones shared with the Device Info app · updated November 2026 Hardware specs only. No personal data. Privacy