Highlights
4G/LTE
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Internal Memory
A1 (Gray) : 4 GB
A1 (Black) : 4 GB
A1 (Gold) : 4 GB
Rear Camera
A1 (Gray) : 13 MP
A1 (Black) : 13 MP
A1 (Gold) : 13 MP
Battery
A1 (Gray) : 4010 mAh
A1 (Black) : 4010 mAh
A1 (Gold) : 4010 mAh
Resolution
A1 (Gray) : 1920 x 1080 (Full HD) PX
A1 (Black) : 1920 x 1080 (Full HD) PX
A1 (Gold) : 1920 x 1080 (Full HD) PX
RAM
A1 (Gray) : 64 GB
A1 (Black) : 64 GB
A1 (Gold) : 64 GB
Front Camera
A1 (Gray) : 16 MP
A1 (Black) : 16 MP
A1 (Gold) : 16 MP
Screen Size
A1 (Gray) : 5.5 "
A1 (Black) : 5.5 "
A1 (Gold) : 5.5 "
Operating System
A1 (Gray) : Android 7.0, Nougat
A1 (Black) : Android 7.0, Nougat
A1 (Gold) : Android 7.0, Nougat
Color
A1 (Gray) : Grey
A1 (Black) : Black
A1 (Gold) : Gold
Expandable Memory
A1 (Gray) : 256 GB
A1 (Black) : 256 GB
A1 (Gold) : 256 GB
A1 (Gray) : Nano-SIM
A1 (Black) : Nano-SIM
A1 (Gold) : Nano-SIM
iPhone 6s is not compatible with existing micro-SIM cards.
No of SIM
A1 (Gray) : Dual SIM
A1 (Black) : Dual SIM
A1 (Gold) : Dual SIM
Design
Display
A1 (Gray) : 13.97 cm In-cell type Ful HD screen
A1 (Black) : 13.97 cm In-cell type Ful HD screen
A1 (Gold) : 13.97 cm In-cell type Ful HD screen
Dual sim standby
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Technical Details
CPU Type
A1 (Gray) : Octa-Core
A1 (Black) : Octa-Core
A1 (Gold) : Octa-Core
Processor Speed
A1 (Gray) : 2 GHz
A1 (Black) : 2 GHz
A1 (Gold) : 2 GHz
Processor
A1 (Gray) : MT6755(Octa Core 2.0GHz)
A1 (Black) : MT6755(Octa Core 2.0GHz)
A1 (Gold) : MT6755(Octa Core 2.0GHz)
Sensors
A1 (Gray) : Touch ID fingerprint sensor
A1 (Black) : Touch ID fingerprint sensor
A1 (Gold) : Touch ID fingerprint sensor
Connectivity
Wi‑Fi
A1 (Gray) : Wi-Fi 802.11 a/b/g/n(2.4G+5G)
A1 (Black) : Wi-Fi 802.11 a/b/g/n(2.4G+5G)
A1 (Gold) : Wi-Fi 802.11 a/b/g/n(2.4G+5G)
Bluetooth
A1 (Gray) : 4.0
A1 (Black) : 4.0
A1 (Gold) : 4.0
Assisted GPS and GLONASS
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
USB
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Memory
External Memory Support
A1 (Gray) : MicroSD
A1 (Black) : MicroSD
A1 (Gold) : MicroSD
Power and Battery
Standby time
A1 (Gray) : 400 hours
A1 (Black) : 400 hours
A1 (Gold) : 400 hours
Camera
A1 (Gray) : Auto HDR for photos, Exposure control, Front flash, GIF animation, LED Flash, Real time beautification
A1 (Black) : Auto HDR for photos, Exposure control, Front flash, GIF animation, LED Flash, Real time beautification
A1 (Gold) : Auto HDR for photos, Exposure control, Front flash, GIF animation, LED Flash, Real time beautification
Exposure control: Drag to focus & exposure
Modes
A1 (Gray) : Burst Mode, Selfie mode
A1 (Black) : Burst Mode, Selfie mode
A1 (Gold) : Burst Mode, Selfie mode
Auto HDR for photos and videos
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Front camera features
A1 (Gray) : Still image capture, Video call, Video recording
A1 (Black) : Still image capture, Video call, Video recording
A1 (Gold) : Still image capture, Video call, Video recording
Aperture
A1 (Gray) : f/2.0
A1 (Black) : f/2.0
A1 (Gold) : f/2.0
Auto HDR for photos
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Camera digital zoom
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Zoom
A1 (Gray) : Digital
A1 (Black) : Digital
A1 (Gold) : Digital
Weight and Dimensions
Width
A1 (Gray) : 76.6 mm
A1 (Black) : 76.5 mm
A1 (Gold) : 76.5 mm
Depth
A1 (Gray) : 8.3 mm
A1 (Black) : 8.3 mm
A1 (Gold) : 8.3 mm
Height
A1 (Gray) : 154.5 mm
A1 (Black) : 154.5 mm
A1 (Gold) : 154.5 mm
Accessories
Charger
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Quick Start Guide and Warranty Card
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
SIM tray ejector
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) : 
Micro USB Cable
A1 (Gray) : 
A1 (Black) : 
A1 (Gold) :