Nokia Lumia638

Exposure date: 2014

Cell phone type: 4G cell phone,3G cell phone,Smart phone,camera phone

Main screen size: 4.5 inches

Texture of main screen: TFT material(IPS technology)

Resolution ratio of main screen: 854x480 pixels

Pixel density of main screen: 218ppi

Network type:  single card

Supporting frequency band: 2GGSM 850/900/1800/19003GTD-SCDMA 1880-1920/2010-20254GTD-LTE B38/39/40MHz

Cell phone color: black, white, yellow, orange

Cell phone size: 129.5x66.7x9.2mm

Weight of cell phone: 134g

Operating system: Windows phone 8.1

Core number: four core

CPU version: Snapdragon 400 of Qualcomm

CPU frequency: 1.2GHz

RAM Capacity: 1GB

ROM capacity: 8GB

Memory card: MicroSD card

Expanded capacity:  128GB

Battery type:  Removable battery

Battery capacity: 1830mAh

Camera type: single camera

Aperture: f/2.4

Focal length/scope 28mm

Video shooting: 720p(1280