Samsung Galaxy S II Skyrocket HD I757
#5898
Samsung Z
#4327Category Breakdown
Samsung Galaxy S II Skyrocket HD I757
Samsung Z
Performance
37.748.2
Camera
19.139.6
Display
80.480.4
Battery
1.622.4
Build
16.814.4
Connectivity
50.154.1
Audio
8.98.9
Overall
26.134.5
Summary
- The Samsung Galaxy S II Skyrocket HD I757 features a 4.65-inch Super AMOLED display with a resolution of 720 x 1280 pixels, while the Samsung Z has a slightly smaller 4.8-inch Super AMOLED display with the same resolution.
- In terms of performance, the Skyrocket HD is equipped with a dual-core 1.5 GHz CPU, whereas the Z offers a more powerful quad-core 2.3 GHz CPU, along with 2GB of RAM compared to the Skyrocket's 1GB.
- Both devices have an 8 MP rear camera, but the Z's selfie camera is marginally better at 2.1 MP versus the Skyrocket's 2.0 MP.
- The Z also has a larger battery capacity of 2600 mAh, compared to the Skyrocket's unspecified capacity.
- Regarding software, the Skyrocket runs on Android 2.3.5, while the Z operates on Tizen 2.2.1, indicating a difference in the software experience and ecosystem.
Side-by-side Specification Comparison
Samsung Galaxy S II Skyrocket HD I757
Samsung Z
General
Release Date
2012
2014
Announced
2012
2014
Description
For AT&T.
Also known as Samsung Z Z910F
Display
Size
4.65"
4.8"
Type
Super AMOLED
Super AMOLED
Resolution
720 x 1280 pixels, 16:9 ratio (~316 ppi density)
720 x 1280 pixels, 16:9 ratio (~306 ppi density)
PPI
720
720
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
Corning Gorilla Glass
N/A
Performance
Chipset
N/A
N/A
CPU
Dual-core 1.5 GHz
Quad-core 2.3 GHz
GPU
N/A
N/A
Memory
16GB 1GB RAM
16GB 2GB RAM
Expandable Storage
✗
✗
Card Slot
microSDHC (dedicated slot)
microSDXC (dedicated slot)
Camera
Main Camera
8 MP, AF
8 MP, AF
Main Camera Features
LED flash
LED flash
Front Camera
2 MP
2.1 MP
Front Camera Features
N/A
N/A
Video Recording
1080p@30fps
Yes
Selfie Video
N/A
N/A
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
N/A
2600 mAh
Battery Details
Removable Li-Ion battery
Li-Ion 2600 mAh, removable
Charging Details
N/A
N/A
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
N/A
138.2 x 69.8 x 8.5 mm (5.44 x 2.75 x 0.33 in)
Weight
N/A
136 g
Materials
N/A
N/A
Colors
Black
Black, Black/brown
Foldable
✗
✗
SAR
0.43 W/kg (head) 0.77 W/kg (body)
0.96 W/kg (head) 1.33 W/kg (body)
Connectivity
SIM
Micro-SIM
Micro-SIM
Network
GSM / HSPA / LTE
GSM / HSPA / LTE
Network Speed
HSPA 21.1/5.76 Mbps, LTE
HSPA, LTE Cat4 150/50 Mbps
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, hotspot
Wi-Fi 802.11 a/b/g/n, dual-band, hotspot
Bluetooth
3.0, A2DP, aptX
4.0, A2DP, EDR, LE
NFC
✓
✓
USB
microUSB 2.0
microUSB 2.0
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, A-GPS
GPS, GLONASS
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 2.3.5 (Gingerbread)
Tizen 2.2.1
Fingerprint
✗
✓
Face Unlock
✗
✗
Sensors
Accelerometer, gyro, proximity, compass
Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate