AT&T Microsoft 640 XL black full specifications and everything you need to know about AT&T Microsoft 640 XL black details.

List of all windows phone

Operating System

Windows Phone 8.1 with Lumia Denim


Qualcomm Snapdragon 400

Quad core

Clock rate: 1200 MHz


Mass memory: 8GB


Maximum memory card size: 128GB

Expandable memory card type: MicroSDXC

Free cloud storage up to 30GB1


GSM network: 850MHz, 900MHz, 1800MHz, 1900MHz

GSM max data speed DL: EGPRS 296.0kbps

GSM max data speed UL: EGPRS 236.8kbps

WCDMA network: Band 1 (2100MHz), Band 2 (1900 MHz), Band 4 (1700/2100 MHz), Band 5 (850MHz)

WCDMA max data speed DL: 42.2Mbps (Cat 24)

WCDMA max data speed UL: 5.76Mbps (Cat 6)

LTE FDD network10: Band 17 (700MHz), Band 2 (1900MHz), Band 4 (1700/2100 MHz), Band 5 (850MHz), Band 7 (2600MHz), Band 28 (700MHz), Band 12 (700MHz)

LTE max data speed DL: 150Mbps (Cat 4)

LTE max data speed UL: 50Mbps (Cat 4)


5″ HD, 1280 x 720 resolution

TrueColor (24-bit/16M)

ClearBlack, IPS LCD


Sunlight readability enhancements, Corning Gorilla Glass 3, Easy to clean, Lumia Color profile

Capacitive Multipoint-Touch


Replaceable battery



Max standby time: 36 days

Max talk time (2G): 26.5 hr

Max talk time (3G): 17.5 hr

Max music playback time: 86 hr

Max Wi-Fi network browsing time: 10.8 hr

Max video playback time: 8.6 hr

Main camera

8MP with auto focus

Digital zoom: 4x

Sensor size: 1/4″

F-number/aperture: f/2.2

Focal length: 28mm

Flash type: LED flash

Features: Backside-illuminated image sensor, Dynamic flash, Rich capture

Minimum focus range: 10cm

Front-facing camera

HD 0.9MP wide angle

F-number/aperture: f/2.4

Features: Still image capture, Video call, Video recording

Video resolution: 720p (HD, 1280 x 720)

Video recording

Main camera video resolution: 1080p (Full HD, 1920 x 1080)

Video frame rate: 30fps

Video zoom: 4x

Video recording features: Video zoom, Continuous autofocus, Video light

Video recording formats: MP4/H.264


Recording codecs: AAC LC, AMR-NB, GSM FR

Recording: Mono

Playback: Audio Streaming, Cloud music offline playback, Cloud music playback, Graphical equalizer, Media Player, Music Player, Podcasts, Virtual surround

Radio features: Internet Radio, FM Radio5

Video playback

Codecs: H.263, H.264/AVC, MPEG-4, VC-1, Windows video


Design details: Exchangeable back cover

Other user interface features: Double-tap to wake, Glance screen, Tactile feedback, Vibrating alerts, Voice commands, Word Flow keyboard


Ambient light sensor, Accelerometer, Proximity sensor, Magnetometer, SensorCore

Device security

General Security features: Device lock, PIN code, Device lock passcode, Regular signed firmware updates, Track and Protect via Internet, Application certification, Application sandboxing, Backup and restore via Internet, Browser integrated anti-phishing, Remote device lock via Internet, Remote device wipe via Internet, Secure boot, Signed OS, Consumer VPN

Enterprise security features: Mobile VPN, Remote lock and wipe, Hardware accelerated device encryption, Mobile device management, Remote security policy enforcement

Supported security standards: TLS v1.0, TLS v1.1, TLS v1.2, SSL v3.0, Suite B ciphers

Wi-Fi security modes: EAP-TTLS/MSCHAPv2, WPA, WEP, EAP-AKA, PEAP-MSCHAPv2, WPA2 (AES/TKIP), WPA2-Enterprise, WPA2-Personal, EAP-TLS, WPA-Enterprise, EAP-SIM, WPA-Personal


Micro SIM

3.5mm audio connector


System connectors: Micro-USB-B

USB 2.0

Bluetooth 4.0

NFC: Pairing, Sharing, Tagging

Wi-Fi: WLAN IEEE 802.11 b/g/n

Wi-Fi hotspot: Up to 8 Wi-Fi-enabled devices

Other wireless connectivity: DLNA, Screen projection


5.56 x 2.84 x .35 inches (141.3 x 72.2 x 8.8 mm) (L x W x H)


5.11 ounces (145 grams)